Using a drop cloth, cover the floor and the area where you will be painting. This will help ensure carpet and other flooring are protected from paint splatter.
Once you have spread out the drop cloth, gather all of your materials and place them on top.
Before painting or priming the wall, check to make sure the surface is smooth.
Once you've sanded and spackled the wall, use a damp cloth to remove any dust.
Use painter's tape to tape off the baseboards, moulding and any light switches.
Once the wall is dry, you'll want to condition or prepate the wall by rubbing chalk all over the surface and erasing.