Maybe a rain tank is just a little too intense for you, but you do want to find a way to make the most of your local rainfall?
(We're just wishing we had a little rainfall!)
Why not invest in a rainwater downspout redistributor ($24.99)? We really like this, and it's something we can actually imagine doing (when we own our own downspout).
During the next Spring shower, just direct the hose to the portion of your garden that needs watering. According to Clean Air Gardening, "1 inch of rain on an average roof gives you over 1,000 gallons of water for your garden or trees."