Measure the wall and plan the layout, making sure to minimize the number of drywall seams in the wall.
Always trim pieces to size. If you force a panel to fit in place, problems could develop later.
When hanging drywall, always work from the top to the bottom.
Always run the drywall sheets perpendicular to the framing.
Hang drywall on ceilings before walls, so the sheets on the walls can help support the ceiling sheets.
Start nails across the top of a sheet before lifting it in place, so your hands are free to lift the sheet and nail it in place.
Stagger the seams across the wall, so that there is not a continuous seam.
As you may be planning to install baseboard later, make sure any small gaps in the drywall are at the bottom of the wall.