Ahhhhhhh, we just got done painting and that was one of MY problems.... I am a sloppy painter (trying to avoid having to do it in the future and hubby hates a mess! lol)
For the glass we used a razor to get the paint off of that and mirrors. You just put the razor kindda on an angle and scrape at it! WATCH YOUR FINGERS!!!!!
As for the floors.... we do not have real wood floors but have the laminate wood floors. We used an old credit card on that- held the same way as a razor and just kindda scrape/chipped at it!
Hope this helps you and hopefully you get out of painting also in the future! lol