In my case, to answer your questions:

1. I do not use any tools to track. For appliances it's have them repaired or replaced when they don't work. For maintenance on the house, do it when it looks like it needs to be done. Also note if you buy a "used house" you likely don't know the true age of the roof, water heater, furnace, etc.

2. I do track warranties although the stuff that goes bad seems to occur after the warranty period.

3. For the minor maintenance I can do, well, my wife keeps track of that whether I want her to or not.