It is very important to learn your notes on the neck and know your way around the guitar. Once you start playing barre chords, you will have to know what the names of the note roots are and where they are on the guitar neck! I have a very easy way to learn and memorize every note on the guitar neck in very short time. Start by learning the Low E String notes on this new Guitar Theory Tutorial Video.
Once you have memorized the E and A String, you can use simple octave shapes to quickly figure out any note on the neck.