I don't do too much. I don't ride every day, nor do I have road salt to worry about down here. Maybe every month or so I will spend some time and clean off the drivetrain, frame, and relube the chain (that's as needed, and it doesn't take a whole lot of time or effort on the chain). i don't spend a lot of time cleaning the drive train to make it all new and shiny, just knock the worst of the grime out. I changed brake pads early last year to Kool stop salmons and have had zero problems or them showing signs of needing replacement. I've had to adjust the barrel on my RD, but cable stretch is normal, and again that is all of a few minutes. In general, I won't mess with something unless I feel it needs to be messed with, but once something doesn't feel like it it working quite right, then I will take the time to adjust/clean/lube.