There are some awful pads in bike shorts nowadays.
Prepare to spend money (it'll be worth it). Go to your local bike shop, look at the shorts (or bibs), see how thick the pads are, make sure they're thin at the edges. Try them on (over clean underwear, please!) to make sure they fit. Buy them, ride them, make sure they're working out. If you like them, you can either go back and buy more, or look for the exact same model online. (Buy the extra pair(s) now, they won't be the same next year!)
While you're in the bike shop, pick up some chamois cream. Put a thin layer on the spots you've been having trouble with before your next ride.