I second Knot's advice on errand running. (I can get back to this now that I've replaced my stolen hybrid with a 197X Schwinn Suburban 10 speed...shiny blue with skinny tires and fenders! It's older than I am and in great shape.)
Errands feel like a treat for me when I get to do them on my bike. I get to listen to the birds and ride right up to the door without messing with parking lots (or the 3.25 gas here this weekend!). It makes me realize how lovely riding is, and I can't wait to get out on my road bike and really fly.
Sometimes it helps if I give myself a destination on my road rides. I'm going to get to X point (hopefully by a certain time) and rest by the lake. Or have a latte. Or visit a friend. (I'm not a hard core roadie!)
2007 Trek 5000
2009 Jamis Coda
1972 Schwinn Suburban
"I rejoice every time I see a woman ride by on a bike. It gives her a feeling of self-reliance and independence the moment she takes her seat; and away she goes, the picture of untrammelled womanhood."
Susan B. Anthony, 1896