Asparagus is actually pretty easy to grow --- it needs a spot in full sun and moist, well-drained soil in order to do well.
You often hear about special techniques for planting it, but they're not really necessary. The one thing to know about asparagus, though, is that it's often sold in spring as a bare-root plant, meaning you buy just the roots. Soak them in water for a few hours to rehydrate them, then dig a hole and make a cone-shaped pile of soil in the middle. Set the roots on the cone of soil, then fill in around them. This helps make sure you don't get big air spaces around the roots that could dry them out.
Don't harvest your asparagus the first year and then only harvest it lightly the second year. The asparagus spears become the stems and leaves; it's important for it to gather lots of energy the first few seasons so you can enjoy good crops of asparagus for years to come.
---Justin, Senior Garden Editor, BHG.com