This has been occuring a lot lately.

Let's say I'm in CO with a hand like [Jd] and it's folded to me.

Button, SB, and BB are fairly aggressive. They'll assume I'm raising weak and there's a good chance I'm going to get 3-bet here. Stacks are M = 20-40. Nobody is desperate.

What do I do and how do I react to the 3-bet that will probably follow?

If you're that deep u can raise and call...and then float the flop.

WIth an M of like 8-15 i just muck against aggro players and wait for a better spot...and steal from EP instead of LP so they give u more respect.

I don't mind open limping in lp... so long as you mix up what you do when you get raised. Gotta be willing to reraise, call and fold so you don't get pushed around.