Move the furniture out or to the center of the room. Assemble all materials and place drop cloths over the furniture and flooring. Remove electrical covers and any home decor and fasteners from the walls. Tape the floor and ceiling edges to prevent paint from getting on them. Fill any nail holes or other divots in the wall with patching compound and the putty knife. Once dry, sand to a smooth finish. Wash the walls and trim and lightly sand trim work if it has a gloss finish. Prime the walls and trim if necessary before beginning the painting process.
Load the angled brush with paint and tap off the excess on the paint container. Paint a line around all trim and at the floor and the ceiling moldings to assure that the paint roller won't bump areas that aren't to be painted.
Pour the paint into the paint pan and roll the roller in it until the entire roller is covered with paint. Use the grate to roll off excess paint before applying to the wall. Roll the paint on the wall in a "V" formation. Continue until the wall is completely covered. Allow the paint to dry before applying a second coat if necessary.
Paint the ceiling molding, door and window trim before the floor baseboards. Use the angled brush to carefully cut in around trim pieces. Paint the wider, flat sections of the boards with the larger straight edged brush. Allow to thoroughly dry before applying a second coat. Dry the second coat before removing the painter's tape.