How to reach 1700 rating on chess.com

Find openings you like and study them. Review your games frequently, or after every match if you can to find improvements. And find a mentor... like John Bartholemeu.

Play alot of chess. You probably don't play nearly enough as you should and its something many players are guilty of. Every time i had some jump in rating it was due to me playing much more than i usually did for a prolonged period, and its probably not much different for the majority of players.
EDIT: after looking at your profile it looks like you actually play quite a bit, with that being the case you just need to be patient. Improvement is not going to happen quickly even for the most rapidly improving players.