You don't need any study to reach 1500 on this site besides maybe simple tactics . It is mainly just playing alot .
You've been here over a year and a half, belong to several study focused groups and teams, have completed many Chess Mentor courses and Tactics Trainer problems, and have just recently reached a 1500 rating in "Live Standard" and "Online" chess.
There's no reason to minimalize the efforts of those that study their hearts out to get to such a rating.
You, me and Equiv is roughly on the same level. For me it was necessarry to do some serious rehearsing work to get here, and I think we are doing very fine. Maybe harder work is required for me, that is over 50 years old.
Matan, I think you did well with this tread. A lot of fine trainingideas are popping up here, such as watching the best players in 3/0= games,(or maybe at longer timecontrols).
The best player in my club, IM Johan Salomon, went from 1900 to 2300 in a year when he played a lot of big tournaments all over Europe. A very important part of it was that he was watching other good games in the tournaments.