[lmm]

I make a point of telling them in the interview that I don't work over 40 hours a week. (This may not be strictly true, but I don't want to work for a company that would consider it a problem if it was).

[throwmeaway2525]

That's another good question to ask: how often is overtime "required"?

You can usually spot it in the job ads themselves (look for "fast-paced," frequent references to "deadlines," and similar language).