i don't usually post on this site, but i follow it regularly. i took the oat this past month. i scored a 370 on RC, which i was pretty happy with.
my strategy was to skim the passage- focusing on the first sentence of each paragraph so i got a basic idea of where things were and what the passage was about. Next, I went straight to the questions. Because I had a general idea of the passage and where things were, I could usually answer the questions or go back for reference pretty easily.
Some questions were worded in a way that made them hard to understand, so for those few I guessed and moved on (marking the questions so i could come back to them).
I actually ended up having extra time- even AFTER i checked the questions i had marked. finally, i just had a few minutes left and i went ahead and ended the section myself...
i hope this helps! i wouldn't worry too much, the test seemed easier to me than i had thought it would be. Good Luck!