Numbers for local pizza and Chinese delivery.
For the plane stuff, some are going to be hours based, some are going to be calendar based. I think you'll drive yourself nuts if the primary record keeping is done either on a whiteboard or in the logs. So make a spreadsheet with *everything* that has to be done periodically, from logs to oil changes. Then list the top 3 hours and calendar based items, with the dates and times. That will be something you can check before you fly to make sure you're legal...with just 3 + 3 you won't have to scan 30 different things. Don't forget IFR currency of stuff, too, including GPS. Update the whiteboard from the spreadsheet when it rolls off.
If you're the only one that flies out of it, put your stuff on there, too. VFR day/night takeoffs for currency, IFR too, medical if you want, biannual, etc.
If you're married/attached, put their birthday on there.