Any prudent home buyer will hire a professional home inspector associated with ASHI. For a good description of what home inspectors do and what they look at, go to this website, which is not my own, he lives in Massachusetts: http://www.ablehomeinspection.com/
Beyond that, a good inspector is going to look for manufactured siding defects, (ie LP siding), Roof issues (old or leaking) Improper homeowner structural modifications (you didn't remove any load bearing walls or headers, right?) Improper homeowner electrical modifications (you didn't ever open your electrical panel and add a circuit without adding a breaker, right?)Water in the crawlspace, rot in the crawlspace, cellulose (wood stuff) products in contact with the soil anywhwere around or under your house (at least 4" minimum away)
Beyond that, trim any and all vegetation away from your siding at least 4-6", have your roof cleaned, make sure none of that beauty bark is closer than 4" to your siding, etc.
If you were the original purchaser of the home, or the home's current windows, and if any of those windows have lost their seal (there is condensation built up between the panes of glass) get the windows replaced by the manufacturer under the standard 10-20 year warranty. Unfortunately, with most of these warranties, they only apply to the original purchaser, and it is better to fix stuff the buyer doesn't know about before they ever see it.
You might also consider hiring a local handyman if you can't do it yourself to spend 5 hours tuning and adjusting doors, windows, stair squeaks, leaky faucets, etc. Give the house a general tune up.
Get rid of your clutter, clean the carpets and your house should sell hassle free in a short time.