I totally meant to post this earlier and forgot! In honor of Earth Day today, Walgreens has printer cartridge refills for only $1! You can use this printable coupon or the coupon from Sunday's Walgreens ad (which is also probably available in stores--it usually is). Refills are available for Dell, HP, Lexmark, Okidata, Primera, Sharp, and Xerox cartridges. I have three cartridges ready to be refilled, so you know I'm making a trip over now! Just think of how many coupons I'll be able to print with those three cartridges! :-)
Oops, sorry! In the title I accidentally put 5/22--I'm getting ahead of myself! It's actually 4/22, today only!