Inexpensive Wax Brush - cutting the bristles of a chip brush will make the bristles firmer, so it makes it easy to use as a wax brush.
painting a straight line next to the trim trick, painting, To make the line even straighter take your 5 in 1 tool wrapped with a wet rag and drag it down the corner At just the right angle this will give you a crisp straight line
How to Mud and Tape Drywall Ceilings : Step 1 Applying Taping
Run a Crisp Bead of Caulk Between Woodwork and Walls
Don't just paint over your problems (that won't fix anything). Grab some spackle and a plastic knife to even out holes on your corner or dents in your wall — then add paint on top of your smooth-as-can-be wall. Get the tutorial at Behind the Studio »
Instead of using painter’s tape to mask off above baseboards and other areas you don’t want painted when painting trim, use a so-called paint shield.
The Best Tips for Cutting in Paint Where beginners run into trouble is cutting in along ceilings, moldings and other areas that require a perfectly straight line of paint. We'll give you some tips and pointers to help you increase the speed and improve the accuracy of your cutting-in technique. http://www.familyhandyman.com/painting/techniques/the-best-tips-for-cutting-in-paint