I am so happy that I stumbled across this site. It's a great resource if you want to download some free graphics every day and you can get them with Commercial Use rights! It's also wonderful for inspiration and can help you feel more creative. I enjoyed reading the stories of how the designers got started and most of them are self taught.
Pixel Scrapper has an easy way for you to search for graphics and many designs come with PSD files so you can edit the colors and elements as you wish. I have used many of these elements incorporated with my own designs to sell new products.