Starthands in omaha poker:

Double pair and double suit

AA KK,  AA QQ

AA 1010, AAJJ

AA 99

Other strong hands in omaha:

AAJ10, J1098

AA-??, KK-QQ, KK-JJ, KQ-J10, KK-1010

KK-AQ, KK-AJ, KK,J10

QQ-JJ, QQ-1010, QQ-AK, QQ-AJ, QQ-A10

QQ-KJ, QQ-K10, QQ-J10, QQ-J9


All this hands are very strong hands in omaha poker.
Other good hands is double suited with cards in order higher than 6.

If you have played a lot of holdem before than keep in mind that a good hand can be really bad rather quick. If there is more than 3 players in the pot and board pairs then you can fold nut-flush if anyone bets :)