#1
I've been playing guitar for almost 6 years now. I'm pretty good and all, but I haven't improved much in a while.

I was wondering if anyone knew some good ways to better your technique once you plateaued. I guess my sweeps need to be improved. Fast riffs (Decapitated Sphere of Madness-ish) could be a bit more cleaner. Maybe some soloing as well. Also learn scales besides the pentatonic.

Any ideas where to start again?
#2
you pretty much answered your own question. other than that get a metronome, try some different tunings, and practice, practice, practice!