Tracking Results With Measurements

What basic measurements do you guys recommend to best track training results?

I assume some would be:

Neck
Biceps/Triceps (Upper Arm)
Forearm
Chest
Waist
Thigh
Calf

Am I leaving anything out?

Any pointers on the best way to measure these body parts?

Flexed or Unflexed?

Pre-workout or post-workout?

Thanks for your help