Watch the Add The b5th online guitar lesson by Rob Garland from The Guitarist's Pentathlon
The licks I played in the solo over the G7 blues used the G minor pentatonic scale with added b5th=G-Bb-C-Db-D-F. I think the best way to really hear a new note is to exaggerate it's use. I breakdown the SRV style lick and also show you some of the other ways I might use the b5th. Experiment adding it to all five pentatonic shapes and work it into some of your favorite blues licks.