Steam clean or replace carpet, fix loose door knobs and railings, make sure windows and doors open and close easily.  Apply a fresh coat of paint where needed.

But you may find yourself deliberating over larger problems.  Should you replace the crumbing driveway? Buy new kitchen appliances? Refinish the floors?  Big repairs cost more time and money.  You could simply disclose the problem and let the buyer deal with it.

On the other hand, the better condition your home is in, the wider the group it will appeal to.  When making a decision of this kind, consider that repairing the problem could also result in a higher sale price.  The best thing to do is start making these big repairs a year or two before you plan to move.  Then you get to enjoy the results too!