You can dig a hole yourself or use an auger. An auger is a machine that has a big motor and a big drill that goes into the ground. If you have a lot of trees or a big hole to dig, an auger, even though it cost $200 or so to rent for a day, is a real time saver. First, cut the container before putting the tree in the hole. Then, don't be afraid to roll the tree on its side to make planting easier. Then, gently lower the tree into the hole and watch to make sure it's centered and not crooked. If you can, get a couple people to help if you're planting a bigger tree. It's important to remember to grab the trunk not the limbs. Don't rush the process. Get the tree right before adding any more soil. After the tree is in the ground, make sure to build a berm around the tree. The raised area of soil directs rainwater down to the root system of the tree where it really needs it for the first year or so. A berm is a narrow ledge typically at the top or bottom of a slope — a mound of earth or sand. Finally, add mulch. Mulch conserves moisture in the soil. A new tree needs a lot of moisture in order to establish itself. A berm also keeps lawnmowers from rolling into the trunk of the tree and damaging that plant you just put in the ground.