A cool little tip I ran across and wanted to share:
At bighugelabs.com you can type in the URL of any photo on the web - or upload your own picture - and their "Palette Generator" will create a color scheme to match the picture. Especially great if you hit a creative block.
So scan -or take a picture of - your art work and head over to this site. It wll give you color schemes you may not have thought of.
Gone are the days of asking, "What colors go with _______?".
They also have about a gazillion other radical things you can do with your digital photos. Scan their home page to see.