I keep my chains clean and shiny. Kerosene is pretty awesome for chains and degreasing most stuff. I keep a jelly jar on the workbench with kerosene in it. To clean a chain, I pour some in my park chain cleaner and run the chain through it some. Then I wipe the shiny chain and chainwheel off with a paper towel and pour the kerosene back into the jelly jar. When I go to use the kerosene again, all the filth has settled to the bottom and the kerosene is relatively clear. I figure I get about 50-70,000 miles worth of clean bike parts from a gallon. Most of my chains are HG and while I sometimes have extra pins for 8,9 and 10 speed, I don't like taking a chain off the bike.
I use WD40 on my Hedge clippers and Tree saw before I put them away after use.