Is easy! You read all the entries, mull 'em over, and pick your 1st, 2nd and 3rd favorites.
Ideally your email or PM will have your votes at the top, e.g.
1st - Untitled #3
2nd - Cool For Cats
3rd - Sometimes They Come Back
...'cause some poor sucker has got to add them thar votes up and figger out the results!
Critique comments are very welcome. Tell the authors what worked for you and what didn't work for you. Tell them what grabbed you by the throat and demanded you keep reading, or what turned you off. Point out brilliant prose. Point out clunky prose that doesn't quite do the biz.
Just waiting for a couple of last-moment slowpokes.
The entries should be with y'all soon...
-Derek