A paint
roller pole might be a good addition to your list Buckman, especially if you're going to paint more than one room.
The extension pole either slots or screws into the roller frame.
The pole is ideal for painting ceilings and the top part of walls, it could save you having to go up and down step ladders for much of the time.
They are sold at various prices, a mid range pole with a good locking mechanism should do the job.
Cutting in, as described earlier is the art of painting a surface edge such as where a wall meets a ceiling without allowing paint to stray onto the adjoining surface.
Cutting in brushes can be useful, and the trick is to load enough paint onto your brush to create a defined edge, press your brush onto the surface so that the trailing bristles drag and draw your brush along to create your line.
If you've never done it, practice the technique away from the edge that you want to cut in first.