I remember there's an app on my phone that saves snapshots in time and lets me go back to them. I quickly pull it up and hit the Back button. With a sound like a timebug in World of Goo, I'm back at the last light, going through it. I know this is too late - I'm about to get stuck on the turn lane - so I hit the button again. Now I'm at the previous light, and I have time to switch lanes before I get stuck.

I'm really excited about this. If I can rewind time yet still remember everything that happened, the possibilities are endless! I can read all the books I want, then rewind time so that the reading took no time at all! I can spend a long time solving a difficult problem, then rewind time and remember the solution. I try to think if there's a way to bring something back with me, a completed piece of work, but I don't know how that could be done. Maybe there's a way to time-proof a USB stick? I start to think about sleep - surely being awake for a long time would take its toll? - but then I reason I can sleep whenever and then rewind time to before I slept.
Wow - great dream!
Your thoughts seem quite familiar to me - I love World of Goo for once - and your spontaneous ideas about using a time machine made me smile - could of been me..

Something unusual from two nights ago:
There were coins scattered on the floor - and I was gathering them up - don't know if I dropped them myself or where they came from.
For some reason - I thought, I had no other way to carry them except putting them into my mouth - which I did.
They had such an intense and horrible taste - not only metallic - I can't compare this to anything.
It was so overwhelmingly nasty - I could still taste it upon waking up from the dream.