Preparation starts with cleaning out the room you want to paint. Remove furnishings like the coffee table or light stand from the room. If there is furniture that cannot move out, you can place all of it in the center of the room to work without hassle. Make sure to cover the furniture with drop cloths or plastic covering to protect it from paint drips, splatters, and sanding dust.
Carefully remove clocks, artworks, picture frames, and other decorative items from the room. Wrap them up carefully and store them away in a safe place.
For items you don't want to paint, cover them with painters' tape. Protect doorknobs, door frames, baseboards, windows, electrical boards, and switches. You can loosen sockets and switches to paint trim around them without getting paint on them.
Also, to avoid any paint bleed, run a putty knife over the tape to firmly press it down for a good seal.
Use clean drop cloths or plastic to cover your flooring and prevent damage from drops and spills. Consider using painter's tape to secure the covering to avoid damaging your floor from any spillage of paint.