(A) If your afraid of heights, but was hired anyway, and you dont like to climb, its okay. Learn these rules and accept the fact that a good groundman is as worthy as a good climber.
(B) Try to anticipate what the climber will need and when. However, dont bug the climber w/ 'suggestions' unless asked for them.
(C) Start the trim saw BEfore you send it up.
(D) When lowering limbs and I saw 'STOP', I mean 'STOP!'. Dont wait until the f'n limb gets hung up in a crotch to realize "Uhhhh, Duhhhh, I's thinkin' 'e sai' stop?".
(E) Standing around on a job site while the boss is gone will be noticed. When its pointed out, dont try to make excusses. Most times they wont be believed.
(F) Make sure you put the gas in the "GAS" tank and the oil in the "OIL" tank. Not vice-versa as the saw wont run long. (I actually had this happen several yrs back. The two groundies argued for weeks as to which one did it)
Thats about it for now. Great List!