As with any scale, you should practice the blues scale in each position. A good method is to start at the root and, if necessary, go down the the lowest note of the position and back up again. Then, go up to the highest note and back down again to the root. Focus on consistent tempo more than speed.
After that, try improvising in the scale, or play the scale up and down two or more octaves, to practice shifting between hand positions.
Any song that has a bluesy, jazzy, swingy or funky feel to it is typically a good setting to use a blues scale. It is better for melodies and solos than for bass lines, but use your own judgment. Also, now that you know the blues scale, you'll have no problem picking up the minor pentatonic scale.