The debate rages over whether the benefits of organic produce are worth the extra expense and while I have yet to form a strong opinion either way, I am a big proponent of using fresh produce as opposed to frozen or canned whenever possible. That said, I'll confess to having stood in the produce section of my local Pick-N-Save on numerous occasions scratching my head over which cantaloupe, peach or apple to choose.
I found this great column in Good Housekeeping called "How to Pick the Perfect Produce." It's a chart, really, detailing what signs to look for, and what to avoid. Quite helpful, really.