Intervals are an important area of study for everyone to master.  Exercises with 3rds, 4ths and 6ths are the most important since they are the most common.  Mastering them in all the shapes and up the fretboard allows you to maneuver the entire fretboard within one key.  The goal is to be comfortable and skilled with intervals as they are found in every musical phrase.  

*3* INTERVAL OF FOURTHS $6.99	*2* INTERVAL OF 6ths $4.99	*3* COMBINING INTERVALS 3rds & 6ths Pt 1 (Demo) $6.99	*3* COMBINING INTERVALS 3rds & 6ths Pt 2 $4.99
*2* INTERVALS OF 3rds SET (Demo) Orig.: $16.95 Sale: $11.99	*2* INTERVAL OF 3rds E SHAPE (Demo) $4.99	*2* INTERVAL OF 3rds G SHAPE $2.99	*2* INTERVALS OF 3rds D SHAPE $2.99
*2* INTERVALS OF 3rds A SHAPE $2.99	*2* INTERVALS OF 3rds C SHAPE $2.99