Thought of a couple to add to the mix:
Empty Region Groups > Markers
Since we're not blessed with multiple types of markers, I use empty region groups to spot foley, adr, make general notes, etc. and markers are left for working with sync or "Pick Up here".
They're particularly useful to block out scenes. I create an audio track, switch the voice from "dyn" to "off", select from the first to last frame of the scene (overlapping for dissolves) and create blank Region Groups. I try and stay consistent with the naming ie. "INT Main Character's BR DAY" "EXT Street Med Traffic Night" so that they all group together in the clip bin. As I go through the show and create my BGs, by the time I get to reel3 80% of the rest of the scenes are at least 75% complete. I come to a scene I know we've heard already, click through my bin, select my bgs, copy/paste, tweak, add/subtract as needed, move on. This works much better in super-sessions with all the reels splayed out, than each reel to it's own session.
Quicker Clip Gain Trims
If you are mousing through your clip gain, stop. Or at least, don't do it so much. In Preferences > Editing > Clips there is a box that reads Clip Gain Nudge Value. This can be as little as 0.1 dB, I have mine set to 0.5. But how do you nudge?
Highlight the region (or portion of a region) that you want to nudge and hold CNTRL + SHIFT + up/down arrow. That was the first way I found. It's good, it's accurate, and it gets you pretty damn close. Then I discovered that the scroll wheel on my mouse worked in place of the arrow keys. Oooooooh, sexy.
But this all assumes that you have no fader at your finger. Want to get super detailed in your clip gain? Use the fader to write volume automation, select the region, go to Edit > Automation > Coalesce Volume Automation to Clip Gain. Voilá. Notice also that you can go back and forth with the opposite: Coalesce Clip Gain to Volume Automation. I have both of these as soft keys on my Artist Mix. So nudge your clip gain, convert, trim with fader, convert, up, down, go to town. :)