Triad -- Are you planning to plant a tree? Just don't start planting without the planning. You need to consider where you're going to put it. Is there sun or shade there? How big will it get? Those are more obvious. Here are some that aren't.
Some trees like River Birch, Weeping Willow and certain types of Maples have very large root systems. Be careful where you plant those. If you get too close to your septic system, the roots can hit it and create holes. No one wants septic system holes!
Think about how big the tree will get. The tag should have that information. If your tree will grow to be 15 feet wide, don't plant it six feet from your house. That small sapling your child brings home for Arbor Day on Friday may grow to be 50 feet tall.
Also remember to use mulch - just don't use too much. Its role is to hold in moisture - so it's necessary. Just don't use too much and pile it up around the tree. That will hold in too much moisture and could rot your tree. Jordan Apple from A&A Plants says to leave a little dip at the base of your tree. Think of it as a pool to hold water around the bottom. Then it is a watering system and a way to keep your tree healthy.
Jordan Apple- A&A Plants