Take a rescue dog to obedience classes. Write a column for your local newsletter or dog club newsletter about rescue. Microchip a rescue dog. Tatoo a rescue dog. Loan your carpet steam cleaner to a foster home.
Donate food stands and food bowls.
Donate dog related cleaning products. Fabreeze for example. Use your video to video a rescue dog in action. Pay for a spring house-cleaning for someone that fosters dogs all the time. Lend your artistic talents to rescue for newsletters, tee shirt designs, fundraising ideas.