While I work with some of the most amazing vendors and suppliers, I do have a few that have demonstrated incredible customer service, great products, and consistent value.  Since this is a frequently asked question, here's the answer.  These are products I use and love...from software to camera gear to websites.

KISS wedding books - luscious amazing wedding albums
ProDPI Photo Lab - best photographic lab around
BH Photo Video - the only place to buy most gear
Shoot Sac - great lens bag
Think Tank - my rolling gear bag
Into The Darkroom - awesome websites
Skitch - incredibly useful program for Mac users
Fotofusion - album design software
Adobe Lightroom - makes edits a breeze
Mac Tower of Power - you can never have enough apples
1Ds Mark III - the best camera on the market for weddings
85mm 1.2 - my favorite portrait lens ever