There is a tool used in wall papering which has a handle and a long thin blade (while thin - it is not sharp). I often will use this while painting rather than taping off to get a nice clean edge. It should speed you job up quite a bit!!
If you're going to cut-in free-hand be sure to use a good, wide brush. The wider (2-3 inches) brushes will eliminate more uneveness.
There is a new product on the market called Frog Tape. I used it when I painted my bedroom walls and ceiling. It has a chemical in it that actually ABSORBS the paint so there is no leaking. It works better than the blue tape or masking tape. Check it out online and see where you can purchase it.
Good luck and happy painting!