Watch the Simple Tricks for Playing Chords online guitar lesson by Allen Hinds from Melodic Improv
Here's a common mistake with playing chords that I hear several guitar players make, some of which are already famous! Guitar is easy to pick up and play open chords, hitting the strings with the flat side of the pick, and that's beautiful of course, but there's more than one way of doing it.
You can also play chords using each finger, gripping the strings like a harp player would. This can be very musical and is defined by the strings that you're not playing. You hear guitar players like Eric Johnson and Jimi Hendrix doing this all the time. By taking out some of the strings and only playing some of the notes, you can make your playing a lot more interesting than playing every string every time.