Push Broom Handle
It’s very important to maintain a smooth, zig-zagging, up and down motion when painting. The object of the game is minimizing strokes for consistency. This can present a problem when painting the upper portions of the wall; you will need a ladder which will interrupt the motion from down all the way up. Luckily, a push broom handle fits into most rollers. You could alternatively use an extension pole, but they can cost upwards of $60, free sounds better to me,
Cotton swabs are good for a variety of painting hacks; For applying petroleum jelly (as discussed above), for quickly removing accidental splatter spots and most importantly, smoothing out the occasional drip or imperfection. Even after you’re done, you should do a walkthrough immediately to ensure you didn’t miss anything or if new problem areas precipitated.
Spilling on furniture isn’t a concern because everyone knows to cover it and get it out of the way. Awkward pieces like vanities and toilets are immovable and even more susceptible to drips. A simple painting hack is wrapping items such as these in saran wrap; it will ensure no staining and allow you to paint freely.