bingo advice needed.

yesterday i tried playing on 10 cards and it was a disaster bc i got flustered early and ended up only playing on 4 most of the time. about half-way through, though, i was able to entirely catch up a fifth card and from there it was easy.... i know wanna try 8 tonight but im afraid i'll do the same thing. i have no doubt i could handle 6. how many do you think sobriquet should play on tonight?