Re: Recording Trick: How to get background harmonies a la Bad Religion
Pan.
PAN.
PAN!!
Seriously, the use of the full stereo field seems to be the one thing 90% of the local-level artists I hear doing wrong on their recordings.
My method is to keep the lead vocal dead center, and pan each successive harmony further and further into left and right, without ever going further than say, 60% left or 60% right (unless you're going for some kind of stereo effect with the vocals).
EQ and compression are definitely useful tools and should be used to help backing vocals blend into the mix, but I can't stress the importance of panning. It's my main pet peeve with a lot of local band's guitar tracks as well.
"we only have one guitar player, so we only need one guitar track. We'll just put it in the middle of the mix" with the bass and kick and snare and lead vocal. Not a good idea. Even if you only have one guitar part going on at a time, DOUBLE-TRACK it and pan hard left and right. I mean double-track, too, not copy the track into both left and right channels and EQ it a little different - it's not the same. Play it twice.
Jeez.

You probably already knew that - I was just venting with the last bit.