It's fairly simple. Don't be nervous. Save yourself some time and money by clipping you bun buns claws by yourself!
Here's what you need:
-Clippers I use human toenail clippers, but you can use cat clippers or small dog clippers.
-Quikstop powder or cornstarch and papertowel or cotton swab, something to help stop bleeding in case you nick the quick
-a bunny (or several)
And now you're ready to go! If your rabbit has light coloured nails, this is going to be easier for you, as you'll be able to see where the quick is. Hold your rabbit in your lap, facing outwards, on his/her bum, with their front legs over your arm. I'm right handed so I put the rabbit over my left arm.
Grab whichever foot you feel comfortable starting with, hold it firmly and then clip the end of the nail off. With clear nails, you'll be able to see where to cut. With dark nails, as long a you keep them on a regular schedule, you should just be able to clip the end off. If your rabbit isn't used to being handled much, and seems stressed out, do a paw or two and then come back the next day to finish. No need traumatize them. You don't want this to be something they dread.
If you let the nails get overgrown, the quick will also grow, similar to a dog's. So it's best to keep them on a regular schedule. Every 3 weeks is a good time frame.
If you do happen to cut the quick, use Quikstop or whatever you have, to stop the bleeding. Once you have the bleeding stopped, put the rabbit back in it's cage. That way, you both have time to calm down.
It's quite simple, and doesn't take much time to do, especially once you get the hang of it. Stay calm, and you'll have it done in no time!