[header] How to install ceiling drywall [title] Inspect the area for any obstructions, such as electrical wires, ductwork, or protruding pipes. [step] Install furring strips to the framing in order to create a flat, even surface for drywall installation around these obstacles. [title] Mark the wall studs to indicate the locations of the ceiling joists for reference during the installation process. 
[step] You'll also want to mark the placement of light fixtures and electrical boxes. [title] Build a t-brace, if necessary.