I have begun knitting flowers in my spare time. Knitting flowers comes as close to instant gratification as anything in knitting. They are quick & easy & there are NO RULES.
You can use whatever kind of yarn you have laying around & make a whole bouquet. I started with Stephanie Shiman’s (of the Wool Peddler) pattern, “Plethora of Petals,” from Knitty. You can really go anywhere from there!