Simple things to spruce up the exterior of your home that won't cost a fortune
Clean up your yard: Mow the grass / onions, fertilize and reseed bare spots if necessary. Remove any leaves from last fall.
Paint your mailbox
Flowerbeds: Trim shrubbery, weed and prune trees
Pressure wash you siding or brick. Consider painting anything that is starting to peel. Neutral colors work best.
Make sure your porch lights work properly.
If you have a doorbell, make sure it works properly.
Clean out your gutters and down spouts, reposition or replace any that are loose.
Wash windows inside and out
Clean and/or repaint your front door and shutters
Inspect and clean out your chimney
Repair / replace any damaged shingles
Repair / replace any loose siding
Remove oil stains from driveway and garage
Purchase some brightly colored potted plants and place at the entrance for a welcoming feeling.