What are everybody's pre flight checks?  I'd like to compile a small list that I could print out to have handy before I fly as I get more comfortable and memorize my steps.

This preflight checklist was posted quite a while ago. Likely it's been updated/refined.  A search might reveal the thread this came from.

Mavic Checklist
Prior to Delivery  
Read the quick start guide cover to cover
Read the manual cover to cover
Watch all DJI Tutorials
Subscribe to DJI Youtube channel
Print FAA UAV Registration and put it in my wallet
   
Post Delivery Inspection
Remove all stickers
Remove Gimbal Clamp
Remove Gimbal Cover
Check batteries for deformation
Check mavic body for deformation
Check gimbal clamp is properly secured to body
Check Lens for Dust or Mold  
  
Preparing for First Flight (Can be performed indoors before going outside for first flight)
Charge Batteries
Upgrade DJI Go App  
Update Firmware
Start up the Mavic with EVERY battery to confirm batteries are looking good in DJI Go App and that the firmware is up to date
Confirm IMU is looking good in DJI Go App
Confirm stick inputs are tracking correctly (note, I am not planning to calibrate the controller out of the box unless I see a problem here)
Calibrate Gimbal  
Take still photos and look for blurry sides or gimbal alignment problems
Adjust gimbal roll if necessary  
Take video and look for blurry sides or gimbal alignment problems
Adjust gimbal roll if necessary  
Adjust Mavic Pro Settings per checklist below
Register Drone with DJI
Purchase DJI Care Refresh from DJI
Attach FAA UAV sticker  
  
Preparing for First Flight (Perform outdoors)
Calibrate Compass (outside, no metal on my person or nearby)

Preparing for Flight (Every Flight)
Charge Batteries if Necessary
Remove Gimbal Cover
Remove Gimbal Clamp
Extend drone legs and props
Inspect drone components - legs, landing gear, sensors, props, gimbal
Turn on controller
Turn on drone  
Start DJI Go App and go to Camera view
Confirm batteries are looking good in DJI Go App  
Confirm IMU is looking good in DJI Go App
Confirm Compass is looking good in DJI Go App - Calibrate Compass if necessary
Confirm GPS lock  
Confirm Home Point Set correctly
Set RTH Altitude to appropriate height (for first flight, let's say 50 ft)
Set Maximum distance to appropriate distance (for second flight, let's say 500 ft)
Set Focus as desired (for first flight, focus at infinity)

First Flight (large open clear area)  Start video recording  
Take off, hover at 40 ft for 10 seconds to acquire precision landing image
Confirm VPS reading  
Verify gimbal wheel
Verify Exposure wheel
Verify C1 button
Verify C2 button
Verify 5D button
Confirm Pitch response  
Confirm Roll response
Confirm Throttle response  
Confirm Yaw response
Fly Boxes  
Fly Circles
Land before battery failsafe RTH
Confirm total flight time

Following Flight
Turn off Mavic
Turn off Controller
Inspect drone components - legs, landing gear, sensors, props, gimbal
Fold drone legs and props
Attach Gimbal Clamp
Attach Gimbal Cover
   
Mavic Pro Settings Checklist  
MC Settings
   Enable Multiple Flight Mode (wait for second flight to do this)  
   Set RTH Altitude (50 feet for first flight, whatever is appropriate for subsequent flights)  
   Turn off beginner Mode (wait for second flight to do this)   
   Set Maximum Flight Altitude (Check 400 ft)   
   Advanced Settings  
      EXP
         Rudder left/right 0.2
      Sensitivity
         Yaw End Point 50
     Sensors  
         Confirm IMU Status as Good
     Smart Go Home enabled  
Visual Navigation System
   Turn on Forward Obstacle Sensing  
   Allow Horizontal Obstacle Avoidance
  Disable Backward Flying  
RC Control Settings
  Check button customization  
Aircraft Battery
   Advanced  
      Auto Discharge 3 days
Gimbal  
   Gimbal Tilt EXP – 50
  Gimbal Tilt Smoothtrack –20-30
   Advanced
       Gimbal Speed 20-30
         Enable Synchronized Gimbal Pan Follow
General Settings  
   Imperial
  Disable Youtube Live Streaming  
   Cache Map in Background Enable
  Video Cache - Enable      

Wow, my pre-flight check list is ;
Unfold the arms, remove gimbal clamp, check props, go fly.............