Stuff his angry little face with food.  :)  Leave it alone, feed it some nice big meals, then handle it in a predictable, calm, and confident way. 

I put all of my baby snakes into a clean sock and carry it around all day.  I rub it, touch it, talk closely to it etc.  At the end of the day, I untie the sock and let the baby come out onto my hand.  This always does the trick!

I like using gloves if you don't have the confidence. That way it doesn't hurt if you get bit, so you won't be too concerned about it and neither will the snake. The more confidence you have, the less the snake will worry about you eating him. Then you can hold him until he stops biting. Then put him back. Do this daily. He'll begin to understand that biting doesn't stop the interaction and that during handling, nothing bad happens.

+2 to Andrea!

gloves are the way to go. flinchy, excited behavior triggers a defensive reaction in snakes. gloves are your best friend if he's bitey; he'll figure out pretty fast that it won't get him anywhere.

I also do something similar to PH's sock-method: I tuck my shirt into my jeans and put the young snake right into my shirt, then wear it around for awhile. they're warm, safe, and dark, and saturated by your smell - just don't forget he's in there and squish him, lol. also, around home's the best to prevent escapes and also to deal with potential poo (although I've done this off and on with new snakes for several years now and haven't been poo'd on yet). 

they may not be as smart as dogs, but training and trust-building have the same foundation: positive reinforcement of behavior that's acceptable.

I was talking with someone on cornsnakes.com last night about this same issue, and I'm going to copy and paste what I explained to them.

"A while back I took in a very very very VERY nasty juvenile burmese python because a friend was just going to dump it ( i know, right? grr). Well, needless to say, I was nervous around her, and she nailed me multiple times. So, I decided that she wasn't the snake for me, and gave her to a friend of mine who has extreme amounts of experience with beyond nasty snakes, she's been bit in the face before, had a 15lb boa bite her thumb and hold on and coil, just like your king did, and much more. Anyhow, when I took the python over to her to drop her off, she took her out and the burm didn't even strike or hiss or anything. No problems, a completely different snake basically. My friend then told me about how snakes can perceive feelings. She explained that she's very confident with holding snakes, and isn't afraid of being bitten anymore, so most snakes aren't "afraid" either, and don't feel the need to strike.

I thought that was some useful information, and I've gotten a lot more confident with my snakes now and it really helps.

BUT, in retrospect, you never want to be TOO confident. Being too confident can also result in bites and injuries that are uneccessary. Basically, it comes back to using common sense. Be confident, but don't be careless. What I mean by that is don't go in and pull out a 14ft snake by yourself and poke and prod at it, thinking, oh, this snake won't get irritated and bite me, oh no. Use common sense and good judgement, but don't give your snakes a reason to think you're afraid or nervous around them. This mainly applies to larger snakes, but it should always be in the back of your mind. Small snakes may not be able to do as much damage as a larger snake, but still, being bit is no fun, and accidents that could have been prevented happen because of carelessness and stuff like that."

Also, if they do bite you, don't react by panicking. The best thing to do is stay calm, and regain your composure and just act like nothing happened. Cause like Aimee and Andrea said, if you immediately put them away after biting, they think they can bite to get put back and be left alone. Confident handling is important, and the positive reinforcement concept Aimee shared is the best way to go about handling potentially nippy snakes.

i think everyone here has shared good advice so far. I don;t use gloves anymore, but I used to. If you do have a bitey snake, it can definitely help. :)

Totally agree with Andrea as well.  If you're THAT scared of getting bit, get gloves...but what's a baby RTB or any baby boa gona do for that matter?  a couple pin pricks isn't going to kill you, but still nice to avoid a bite in case there's a possible salmonella contamination or possible bacterial infection.  Just start with a hook to grab the little guy then hold him.  Don't put him back just because he bit, that's just like teaching a dog it's ok to jump on people for a pet right when they walk in the front door, or any other encouragement of bad behavior for that matter.  Start it out once or twice a week with handling so you don't stress him out, and at the snakes own comfort rate and pace of improvement slowly up the amount of times you can take him out until you can pull him out whenever you feel fit.  Just make sure the person that will be getting that snake back (if that's the circumstance) doesn't throw all your hard work and effort away by feeding him in his cage and leaving him alone.  We just took on a burm that is about 2x her size for her age so she's got a pin head on a fat body.  She's VERY agressive because that's apparently all the previous owners did was feed her and not interact at all, but she's getting better.  So with all that said, persistance yet patience will pay off in the end :D

+10 to Jen! Feed that mad little brat and in a couple days pull him out like "who's your daddy" If you just can't handle getting tagged a couple times, wear the gloves. I have 9 red-tails and a few dumerils and they all start out the same, bitey/striky/hissy pissy pants. It just takes time for a little one to understand we may be giants, but we mean no harm.

MOST instances of aggression stem from stress.... and hissing is a very normal response for boas..... the whole idea of"taming" a snake is really a fallacy....   Basically either the snake feels threatened   or content.....  you have to get the snake to a point where it doesnt feel threatened while handling.....  It is better to let the boa get settled in to it's new surroundings first..   ...   but definitely dont  stick it in a gym sock and carry it around all day with you./.....LOL...    If it gets ticked off and starts biting... then put it back in it's cage......  sometimes they just dont want to be messed with.....   you need to be able to read when your boa does feel like being handled....     If you try to force handling on them when theyre pissed, in an attempt to "train" them it will only stress them out.... they aren't "trainable" animals....  they dont have that level of intellect......       you have to be patient...... be deliberate.... but don't force it on them..... EbonayiasGirl, boas are nothing like dogs.... you can't train them like dogs...... they are wild animals that sometimes "allow" us the privilege of handling them.... but they don't enjoy it, or learn how to be tame..... they just tolerate us........