(1)  CLEAN UP, CLEAR OUT.  $0 to do it yourself – $2,500 for a pro, but you get could get a 3-5% return.  Get rid of odors!  Musty odors could mean mildew or even mold.  If you have pets in the house do regular professional cleanings till the house sells.  If the weather is nice, open up windows & let fresh air in, but do not overdo air fresheners or gives the impression there is an underlying problem.  Let in as much outside llight as possible before showings.  Replace tired old carpet with maybe tile or vinyl which is cool & modern.  (2)  SPRUCE UP THE KITCHEN.  Cost range:  $300-$5,000, but a 3-7% potential return.  Do NOT spend megabucks,  but fix a leaky faucet, loose light fixture, burn mark on countertop.   Paint walls, update the cabinet hardware & add new curtains.  CONTINUED FOR MORE NEXT TIME.