If you could only have three accessories...

The scenario is basically - if you had a camera, lens, (with batteries and memory card - basically everything you need to take photos, as well as the computer side sorted) what three accessories, listed in order, would you absolutely not be able to do without? Feel free to elaborate on your choices!

This is not about lenses or bodies - just accessory items that enable your system to really get great results.

For me it would have to be:
1) Circular polariser

2) Flash

3) Off camera cord or (I wish!) a set of pocket wizards.

1) Tripod

2) GND

3) Flash

Bag
Tripod
Speedlight

Tripod
CPL
Remote Release

1) Pants

2) R-Strap

3) Bounce Board

Bag, Tripod, lens cleaning cloth.

1) flash

if I must list a 2 and a 3 (because I can't think of anything else that I consider a must buy)

2) tripod
3) a good bag

1. Bag
2. Flash
3. Camera Strap

1. Gitzo tripod with Markins ballhead and RRS clamps and plates - no brainer, not an option, a must for good photography
2. Flash or stobes - you got to have adequate lighting, better if you can control the light
3. Gitzo monopod - a must for sports shoots with the big guns

Tripod
Mac
Flash

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slingpack
tri/monopod
blackrapid strap

Flash, tripod and CP.