Need advice regarding painting.

[jeff47]

1. First, you will always see flaws

The disadvantage of doing it yourself is you will see flaws that no one else will.

Some options off the top of my head:
1) Make the walls and ceilings the same color. That way it doesn't matter if you get "wall" paint on the ceiling.

2) Correct the problem only where you see it - you don't need to repaint everything if there's only a few uneven spots. Since you have exactly the same paint and it's still new, the patches will dry exactly the same as the rest of the wall...might be hard to convince yourself of that though since you will remember where the patches were.

3) Bust out the carpentry skills and put up crown molding

What are you painting with? Many people find foam brushes to be easier when they first start with delicate work. Once they have some practice, bristle brushes work better. Also, an angled brush will help get close to the ceiling without getting any paint on the ceiling.