I know that if I think I'm ahead, I'll usually keep betting until my opponent gives me reason to think otherwise, so an observant opponent could use that against me calling me down with something like 2-pair against my TPTK.

But I think your question is more about calling a pre-flop raise. I think you can use your implied odds to make some "bad" calls preflop, but you've gotten know when to let go, and how to get paid when you hit. Just make sure your cards aren't likely to be domitated. So calling with a low suited-connector would be better that, say, K-J. But I'm still learning how to make money doing that, so more comments would be appriciated.