Check out Karen Otto's blog post at http://energizedseller.com/blogs/valuableinfo/archive/2008/03/31/curb-appeal-is-important.aspx for a great post on curb appeal. Below is an excerpt from it:
Curb appeal is the very first impression that a buyer will have upon previewing your property. Even people driving through a neighborhood may want to see a property based just on exterior curb appeal. Make sure you present the exterior of your property in just as good of condition as the inside of your home. In some cases curb appeal can truly make or break the sale of a home. Below are some helpful tips to give your home that "butterfly and rainbow" feel you want buyers to have.
10 Tips for Top Notch Curb Appeal
1. Maintain a regular watering, mowing, weeding and edging schedule
2. If grass is sparse consider re-sodding areas as needed.
3. Keep trees and hedges trimmed away from the house (consult with an arborist for best time of year to prune mature trees). If you can't see the house, you can't possibly sell it.
4. Freshly mulch all beds.
5. Seasonal flowers are always a welcome addition but keep in mind any water restrictions in your area when purchasing.
6. If any part of the exterior of the house (e.g., shutters, siding, the front door) need repainting or repair... Just do it! A fresh coat of paint says, "Look at me! I've been cared for!" and gives a good return on your investment.
7. Keep lawn art, toys and yard equipment out of sight. Roll hoses up neatly.
8. Pressure wash roofs, driveways and sidewalks if needed. Clean exterior and interior windows, screens and tracks as well.
9. Keep porch or entry way free and clear of unnecessary obstructions.
10. Invite buyers in with a welcoming wreath (nothing busy) and freshly potted plants on the porch (no more than two in uniform pots). A new door mat (not personalized) is also recommended.