Try something new. About once or twice a month, try a new technique or a new product. This is something I have been doing for the past year. I have since learned so many new things, and have found some great products that wowed me, as well as some that I will never use again. But I'm glad I tried them all!
One of the things I tried recently was to really experiment with color. I went to the fabric store one day and bought about twenty yards of brightly colored fabrics, then came home and started using them! I used to stay in my blue/green comfort zone, until I found out how fun it was to use bright yellows, oranges, and lime greens. Now my fabric wall has about every color imaginable!