Tunerman
For song sections, I've done the same as BobF, but taken it a step further. I color code each section such as verse: green; chorus: red; solo: yellow etc. 
 
Just go into the Inspector under Clip Properties and change the Background & Foreground colors. Name the clip also if you like. For the single note Bob mentions, drop the volume on that note to zero. Now you won't have to mute the track.
 
On large projects with many tracks in view, I may copy or clone the color track to the bottom of the screen as an added roadmap.
 
 

I use colors as well ... and although the colors get subdued a bit, stretching/moving/selecting all continue to work fine with the track archived.  I really wish I had bookmarked the video or the thread it was posted in.  It was a Cake dude that showed this technique in the video.