Found this on the forum not so long ago..And yeah this thread is a good idea!
" you run out of time for one of the ETPs in the exam (usually the last question worth a LOT of marks), then a really good way is to simply calculate total distance then check which of their answers move into wind. Quite often two of their four answers can be discounted immediately. Then if you are out of time, you have a 50% chance at guessing the right answer for a big question - can get u over the line."