Drummer-I agree that the first thing to do is clearly understand the market. What has sold, price range, how long it took. Look at last 90 days, max, 6 months back. Compare your house to those. Choose the ones that are the best comparables. Then get the stats for the current listings.
When you have that info, you will be ready to determine what renovations you will do. 2-3 bids from recommended people who will provide references. My off the cuff response is that street appeal is important, so spiff up the plants. Fresh, neutral paint is inexpensive and always positive. At that point, I sometimes provide the consulting, other times I hire a stager to come in and assess the property. Sometimes that will help you show the house to its best advantage. A consultation, fee for the assessment, is about $75.
If you would like my help, with getting statistics for your area, providing names of qualified builders, and/or a good staging consultant, please let me know. Good that you are taking your time before jumping in.