Clear the room
The next thing you'll want to do is deflate your inflatable couch, chair, and bed, and… wait… you have actual furniture? Oh… yeah, me too. Okay, so the next thing to do is move whatever furniture you can out of the room. Anything that's too big, cover with a drop cloth.
Prep your walls
Use some soap and water to wipe off all the dirt and oil caked on the walls from your dirty, oily hands. You don't have to be too thorough, but it’ll help the paint adhere more. Then, use painter’s tape to cover up electric sockets and the trim around windows, doors, and ceilings.
Prep rollers and paintbrushes
Wash the rollers and brushes with cold water before using them. The water will take all the fuzz off of the rollers as well as keep the paint from caking to the top of the bristles on your brush. Don’t worry about letting them dry either, you can paint with a wet brush/roller.