Don’t make something unless it is both necessary and useful; but if it is both necessary and useful, don’t hesitate to make it beautiful. – Shaker Philosophy

While this doesn’t apply to my work 100%, since not everything is necessary it is something that I keep in mind. The part about “don’t hesitate to make it beautiful” is what stands out the most. If you are going to have things (and who doesn’t) they should be items that you appreciate, use and enjoy.