The idea of scales moving along the neck is a very important one for all guitar players to seriously study. It makes a huge difference with both your soloing, and with how you end up working out the phrasing for your composed melodies.
Spending an appropriate amount of time during your practice hours working out pre-learned patterns across the guitar neck is very important. The patterns that you develop will, over time, become memorized and you'll be able to perform them whenever you'd like. When you study these concepts along the neck, be sure to explore how you personally prefer that each slide is done, because every guitar player is different in their technique.
If you've ever seen guitarists, Steve Vai or Eddie Van Halen apply these concepts - moving scales rapidly along the neck - those guys are able to do the shifting with pretty much any finger of their fret-board hand, (and they seem to have dozens and dozens of these shapes well rehearsed). So, be sure to spend time studying their styles and fingering shapes to gain further insight.
In the video I zoom in on the guitar neck and run through a few examples to get you started with properly shifting along the neck with some major scales. On-screen TAB is included for each example.
Watch the video below to hear and try out the examples:
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