This requires a steady hand. What I do is take the guard off the beard trimmer and cut the hairs close to the skin. Then finish it off with a blade. Be conservative (take less off than you might want to) the first time. Sit with it for a day or so to decide if you want a deeper cut. If you feel you got the hang of it, then do a little more the next time.

Patience shall be rewarded!

New beard growers: Check out the Rules of Beard Acquisition.
To upload and post pictures, here is a tutorial.
Do you believe in these Common Beard Myths?