Watch the All The Modes online guitar lesson by Jon Finn from Modal Rock Soloing
This is a fun way to practice modes. Once you learn the notes, fingerings, pattern etc., the next step is to use them in a musical context. Here's an exercise I like to use. Each of the chords that were used to demonstrate the modes is placed in order in the drill. Each chord is held for 8 measures, then you move to the next chord. Once all the modes have been played (Lydian, Ionian, Mixolydian, Dorian, Aeolian, Phrygian and Locrian - in that order), the entire process is repeated. The second time each chord is held for 4 measures. Next time, 2 measures, then 1 measure (twice around), then finally, 2 beats. This gives you the chance to hear them all next to each other. Compare the sounds, identify characteristic notes. How are they similar? Different? Can you improvise this playing the correct notes and not sound like you're running scales?