Shootsac or Kelly Moore Bag
Canon 5D Mark II
Canon 50 f1.2L (stays on my camera the majority of the time)
Canon 100 f2.8 Macro (mostly for detail shots like rings and some portraits)
Canon 35 f2 (great for big sweeping ceremony photos, wedding party photos, large formals, and reception dancing photos)
Canon 45 f2.8 TS-E (good for detail shots and some portraits)
Canon ST-E2 Wireless Transmitter (for firing my flashes)

I like to work light, so this is the only gear I actually carry around with me (plus copious amounts of memory cards and batteries). I also have a second gear bag that holds all my miscellaneous items. This gear serves as my backup kit, as well as supplemental gear for my second shooter, should she need it.

Lowepro Pro Roller 2
Canon 5D (backup camera)
Canon 70-200 2.8L (used during the ceremony for closeups)
Canon 16-35 2.8L
Canon 28 2.8
Canon 85 1.8
Canon 50 1.4
Tamron 28-75 2.8
Canon 580 EX (4)
Canon ST-E2 (backup)
Canon flash sync cord
Lowell ID 100w video light w/ 4-way barndoors + Bescor battery
2 Lightstands
1 Monopod (to use a light-on-a-stick, as held by my assistant)

Here are a few things I DON’T use (nothing against any of these items, I just don’t find them necessary for my shooting style):
-Lensbabies
-Pocket Wizards (I own them for emergencies, but rarely use them)
-Filters
-Flash diffusers (I have a couple but they have been gathering dust since I bought them)
-Strobes
-Flash brackets
-White balance tools (ExpoDisc, grey card, etc)
-Reflectors (again, I have a couple, but I never use them)

There are a lot of neat gadgets and gizmos and add-ons that the camera industry pimps out, but in my experience most of them are either gimmicky or easily replicated in Photoshop/Lightroom. Gear is useful, but only to an extent. The truth is, if you can’t take a good photo with a Digital Rebel and a kit lens, you’re still not going to take good photos with a 5D and a 50 1.2L. However, if you CAN take a good photo with a Rebel and a kit lens, investing in professional-quality equipment will help you take the quality of your already-good images to the next level.