If you're not using your inkjet printer regularly, shut it OFF. Leaving it in 'Power Save' mode won't allow the heads to fully park, and often time ink will dry out in the cartridges. It also lets unspent ink dry in the heads, which means running the cleaning cycle more often (and wasting more ink in the process). Not only are you saving a few bucks on ink, you'll save a few bucks on electricity as well. Also, your image quality will remain high for a longer period of time, so you may not be as quick to whip out the old Louisville Slugger on the ink guzzler.

And don't worry about boot up time compared to power-save mode. Modern printers are ready to print from a cold start in less time than it takes Lindsay Lohan to tell a judge to eff off (15 seconds or so).