Once a turn has gone down it I really don't want to touch it. That being said. I'm to damn cheap to pay someone for something I can do.
I suggest the waxfree style ring. These things are getting good reviews. The benefit is most come with holes in them for the flange bolts. Meaning. the bolts are held in place with more than luck. We all have set the toilet down and bent the bolts over into the wax ring. Who needs that. the wax free ring is more forgiving.
Gloves.
scraper.
paper towels.
Someone standing by with the profanity beeper(my personal suggestion).
wrench sized for the nuts and water connection to the tank, unless you can remove it by hand.
small hack saw or dremel to cut the new bolts(unless you don't want to use the plastic caps to cover them).
trash bag to set the toilet on when you remove it
trash bag or other plastic bag to put old ring and paper towels in.
replacement ring
PATIENCE LOTS AND LOTS OF PATIENCE
I'm sure there is more needed...
Gas mask.
Woody