I like to go by mileage for things, as time can vary greatly for the same distance. Some weeks I'll get in 400 miles, others 100, some none.
I check chains at 1000, and usually replace at 1500-200 miles
Cassettes I check at 3000, and usually end up replacing at 5000
I lube my chain once a week regardless, and air tires up by how they feel (usually every 2-3 days), though I'm lazy with those
Front tire gets rotated to the rear at 2000 miles for a new one, 1000 miles for one that's been rotated from the front. New one goes on the front. Or if you don't want to do that, 4000 to a front, 2000 to a rear.
Chainrings get done at 10,000 ish miles, though those are more of a keep an eye on them item. Depends on how good you are about replacing your chain
Cables get done every 5000 miles as it's cheap and will make the bike feel much better even if they would have lasted a lot longer. You can stretch these to 10-15k, but why, it's only 25-30$ and makes everything shift like new again.
New bar tape when I do cables.
I overhaul my hubs at 7500-10000 miles, completely disassemble, repack and regrease them.
This may seem like a bit of overkill for some, but I've never been in a race where a mechanical has stopped my from finishing. Never snapped a chain, or prematurely worn a set of chainrings or cassette etc. And my bike always feels and shifts like new.