Daily
- Check tire inflation
- Check for headset/bottom bracket/hub play
- Check that quick releases are on right
- Check brake pads
- Check panniers for solid fit
(This takes about 30 seconds)

Weekly
- Remove, clean and lube chain (I usually just pop this off on Friday, soak until Sunday morning, let drip dry, then lube.)
- Scrub cassette, maybe remove and do so
- Check that wheels are true, fix if needed
- Clean miscellaneous dirt
- Run derailleurs to limits and adjust if needed

As needed
- Rebuild wheel hubs
- Replace chain/cassette/tires/brake pads
- Replace bar tape, etc.