Moving to mid-limits, avoiding traps

[ChicagoTroy]

I'm looking to move up to 10-20 soon, and I've noticed that when the occasional 10-20 player has sat in 5-10 waiting for a seat, I've been tricked by slowplays or cleverly played draws. The tricky plays at 5-10 tend to be wrong ones, but from some of these slightly better players at 10-20 they are correct, I would like to shorten my learning curve as much as possible.

Bob Ciaffone had a clever line about the later plays being more likely to be the truth than earlier ones when you're wondering what your oppenent is up to. Does anybody have any advice about detecting slowplays, bluffs, or other tricky moves seen above low-limit holdem? I know a lot of this will come down to accurate hand-reading...