i don't know if sonar's audiosnap has gotten easier to use since S6PE but if you are a guitarist i would recommend using it in reverse - lay down some rhythm guitar (acoustic is best for catching the spikes, even if you don't end up using it) and then use that to line up your sequenced drums.
didn't see this mentioned skimming through, but the corollary to "don't quantize" is
find a groove. no matter what genre, even happy hardcore trip hop glowstick, there is a groove. sometimes (as in the happy hardcore etc.) it's a lot more dynamics (and very fast) and less about timing. sometimes (slow blues) it's a lot more timing and far less dynamics. but there always is one, or its boring.
i remember back in high school, when i was still sequencing MIDI, playing a song (which was perfectly quantized of course) for a couple of my friends (girls) and being taken aback when they started dancing to it. (After all, this was serious work.) years later, i realized a very important fact: people want to connect to your art. even my perfectly quantized sequenced-over-many-weeks really-not-that-good intended-to-be-a-serious-yet-upbeat song had enough emotion and life and dynamics to go straight past the "brain" and right to the soul, somehow.
guitarhacker said something very important: write the song before you start recording it. if it's not alive in you, if it doesn't come out of you naturally, if it doesn't make you smile and take you somewhere amazing, it won't do that for anybody else and no amount of recording goodies will change that. the only counterpoint to that is, record your inspiration. doesn't have to be sonar, you can do it with a handheld recorder or even your smart phone.
when you've got the song written, when it's part of you, then record it with your key instrument, as a scratch track. go from there. click track, lay drums on top of the scratch track and audio snap, whatever. just get the
song recorded and the rest will come pretty easy, because it will either fit, or it won't.