If you want to learn the blues, it really helps to think of it like it is a language. Learn the alphabet (scales) then words (licks) then put them into sentences (phrases) and eventually into poems (solos). The vid explains this in more detail.

You might want to check out my CD and booklet pack that will give you many licks and phrases to use, and get you transcrbing too ;) PR-021 • Really Useful Blues Solos (sorry for the plug...)

Video Lesson