Here is a planet capture tip that I dont see in the FAQ but found through a search. For section 7.2.18 or so...
From this thread (even says it should be in the FAQ):
Picking up troops after ground combat
Summarized:
7.2.18 To pickup troops after combat and capture multiple planets in one simultaneous turn, order your planet capture fleet to ATTACK (instead of MOVE) then, load troops, attack other planet, load troops, etc.