For the wind star I got a plastic sheet, you know those fairly stiff ones that fit into the A5 books (you can cut it down, kinda like clear card)...well draw on that your wind star with permanent pen. When doing your winds that morning of test/flight write in you corrections (different colour). I used to do just N,E,S,W and then every 30 deg between. The clear sheet will fit over your diversion point. You have your new heading straight away. Also marked the sheet with 10nm on the arrows coming out. Diversions made simple!
Stopwatch I put velcro on back of mine and velcro on the yoke. Stick it up there out of the way.