If you'd like to add a little interest to your paint job, I have some decorative techniques that are easy to do and will give a great result!

Make different sized spiral design templates with some corrugated cardboard. Roll it loosely and secure it with a little tape. Dip the end of the roll into a little bit of paint, dab it off and start on the wall, you can space them out or make a design.

Try "stamping" the wall with wall stamps from the craft store.

How about stripes? There are a couple of different ways you can do these. For small "freehand" stripes, use a utility knife to cut notches into a rubber squeegee. Then you can either drag it through a fresh paint job, or dip it in a contrasting color and pull it down the wall. Work slowly so you don't get gaps in your stripes. For more uniform stripes, measure how far apart you would like them and run some painters tape down the wall. Then you can use a roller to paint between the strips of tape. Allow it to dry and then slowly and carefully peel the tape off.