How do you do a burnout in a manual?

Step 1:

Rev Engine. Try not to rev too high, or you may cause damage.

Step 2:

Dump the clutch. This is achieved by quickly depressing the clutch pedal.

Step 3:

Try not to die. Because you have to ask how to do a burnout you probably lack the technique to perform the simplest of driving tasks. Actually, you should probably just stop driving all together.