To begin with, it's important to plant at the right time.
Summer is generally the worst time to put a plant in the ground.
Fall planting works well in mild-winter climates, and of course, spring bulbs must be planted during fall in all climates. Almost anything can be planted in spring, with good results. Choose the proper tool for planting. If you're installing a large plant in a heavy soil, use a large shovel. When planting annuals in a prepared flower bed, use a trowel.