Without seeing the home and the competition, it's hard to give specific advice. In general clean, clear spaces, fresh paint and carpet. Attend to curb appeal by keeping the front clear, grass cut, weeds gone etc. Most of these changes will cost very little and help you stand out.
Buyers are not looking for projects, or if they are they want a big discount. The more move in ready you can make the house the better.
Now, let's also be careful not to get carried away. A $50k kitchen is great, but in a $250k house it's overkill. You want to spend the money that will provide a greater return or at least an even one, but speeds up the selling process.
Many agents have training that can help you. My wife is an Accredited Staging Professional and we get her into our prospective listings as early as possible. Sometimes a seller has ideas that aren't the best use of their time or money. It just comes down to the house, the competition, the market and the resources and motivation available.