Oh my-LANTA how I love this. I want to buy all the cheap white coffee mugs in all the land and I want to Sharpie the hell out of them. I have soooo many ideas. Soooo few mugs.
I did extensive research as to the best method to sharpie one's mug.
Most importantly you cannot use just any old sharpie, no. You must use
an oil-based sharpie paint pen. Say that ten times fast. You'll
also need cheap mugs, I hear the cheaper the better, rubbing alcohol,
toothpicks, q-tips and assorted paper towels and cotton balls. But
mainly just the pen and the mug. 
Clean the mug with rubbing alcohol and make sure to remove any price tags or stickers (why do they insist upon those stickers??). Then once that dries you just start writing and decorating away! If you make a mistake you can simply use the rubbing alcohol to wipe it away. The toothpick or q-tip can help get into smaller areas if you just need to fix something minor.
Now I let my mugs dry for three days, but I have read other people don't do that. I was just erring on the side of safety. After those three days place them upside down in the cold oven and set it to 425 degrees. Then bake them for one hour. Turn the oven off and let the mugs stay in there till they cool. And that's how it's done.
Watch out everyone I know in real life, you'll probably be getting one of these at some point.
