Watch the Two Guitar Techniques online guitar lesson by TrueFire from Play Rock Guitar 8: Advanced Rhythm Approaches
In section 3 you'll look at what might be possible when you have two guitars in the band. Twin guitar parts can be a blast but you have to choose what each person plays wisely. Here you will find several tunes broken down part by part.
TIP! Whatever you sit down to practice on, remember, breaking it down into small chunks will help you play it better, and remember it better. Take a lick or rhythm or pattern and see if you can break it down. Maybe you can look at what your right hand is doing, then what your left hand is doing. Look at each little technique involved and work on those individually. Once you have all the little pieces sounding good - then glue it all back together and voila! You will find that the whole has been strengthened by working on each little part!