1. Have a squeegee in the shower stall. After each shower, squeegee the walls and the tub, then have a designated towel to wipe over the chrome.
2. Use the same towel to wipe up the sink after use--porcelain and chrome.
3. Use some toilet tissue to wipe up the rim of the toilet bowl after use. And every few times, use a toilet brush to get the bowl.
These take just a moment but keep your bathroom looking good a lot longer.