Weird things premiere does that I've got used, but maybe I don't have to

I've been using premiere for long enough that I know its moods. There's a few things it does that I now understand but mostly don't. I thought it would be fun to coral those things in one post, so please add your own, or explanations or workarounds.  

1. Where are all the things?
Grey thumbnails - premiere just seems to have had enough of generating thumbnails and needs a bit of a lie-down.  This is because premiere gets confused with all those bins.  It's really old, so I can forgive a bit of absent-mindedness.  Solution: close all the bins except one* (*when I say solution I mean it sometimes works, if it feels like it)
This one is also responsible for...

Reveal in project  - greyed out (clip on a timeline) &

Reveal sequence in project - greyed out (or your shortcuts no longer working)
Replace with clip > from bin - greyed out

2. No Cigar
Changing the speed of a clip on the timeline to eg 200% creates a clip on the timeline at 197.22% or other weirdly not 200% number. (No solution)

3.  Monitor N@zi*

Workspaces - premiere will remember where everything is, except your bins on the other monitor. They must always go with effects on the first monitor. Always! No extra monitor for you!  *Seinfeld reference, don't ban me.
 (No solution)

4. Wave goodbye to waveforms
Some projects PR really can't be bothered generating waveforms. Or if it does they appear for a bit and then *puff* they're gone like a caribou.  Zoom in? Gorn!  Then you play the will-they-won't-they game to see if they re-appear.   
Clearing the cache seems to help for a bit, but I suspect this is down to one piece of media that premiere doesn't like - because it will happily work fine in one project but not another.  One thing I haven't tried is creating a new project and importing the old into it lock stock and barrel.