So first of all, please don't look at my bad English
The most important thing to get faster is to know how to practice. It took me less than a year to get sub 10, with not more than 70 solves every day, because:
It's very difficult, but you have to recognize your mistakes and try to do it better next time. For example if I've learned a better solution for one f2l case from YouTube and I do it wrong in the solve, I reverse it, just to solve it the right way. Sometimes this ruins your averages, but that is a fast way to improve.
Slowturning is also really important !
I haven't been cubing for half a year now, but today I started again. ( I switched to Roux half a year ago)
When I started, my average was somewhere at 14 seconds, after some solves i got better and the AO50 was 13,13 I think, the next AO50 was 12,81, the next 12,46 ( I started with cold Hands, but the last times saved the average) and the last AO50 was 11,64. Now I really feel comfortable with Roux
