How To Paint A Room: A Step-by-Step Guide To Nailing It Like A DIY Pro Step 1 - Gather Supplies Step 2 - Pick your Paint Colour Step 3 - Prep the Room Step 4 -  Prep your Walls and Trim Step 5 - Paint the Ceiling First Step 6 - Paint the Trim, Window Frames, and Doors Step 7 - Apply Painter’s Tape to the Edges Step 8 - Cut In Wall Edges Step 9 - Use Roller to Paint Step 10 - Remove Tape and Clean Up