1. Do not start work until you know your town's rules. Make sure you've got a permit for everything you need.
2. Do not plant invasive species. They're bad for the local ecosystem & they'll get out of control on your land. Beware of terms like: "vigorous spreader".
3. Do not plant along the edge of your yard until you know exactly where your property line is. Using plants & trees as a screen is a nice way to improve an unpleasant view, but don't let it turn into a nightmare. If you take down a tree that you thought was yours & it was really your neighbor's, you can expose yourself to a lawsuit.
4. Do not hire an uninsured contractor. If they get hurt on the job, the homeowner is liable.
5. Make sure your landscaper knows what he is doing. 2" max for mulch. Use the right plantings & the right soil (acidic or alkaline?). Know how big a tree or shrub will ultimately grow.
6. Extra tips: When planting, less is more. Don't be afraid to pull everything out & start over. If the front of the house is a lot of overgrown shrubs, it can make the house look dark & dingy. The best bang for the buck is "foundation planting", planted directly around the house. Use shrubs to create screening of unpleasant views. Remove trees to let more sunshine into the house. Build a patio as an extension of the house, an outdoor room. Patios can be used more than 6 months per year and are great for entertaining, family dining, & cooking.
Simple Tips to Help You Sell Your Home in Amonk - exterior landscaping