How to use Burst mode with nikon D5100?

I want to shoot in burst mode but i don't know how to activate it (turn it on). How do i? Could someone please walk me through it?

See page 35 in your manual. It's called Continuous Mode.

I prefer leaving my camera set on continuous mode all the time. It's easy to snap one shot in continuous mode, or, if need be, your camera will be already be set up to rattle off a bunch of shots.