Avg. 1200, best/fastest way to improve?


Study games from masters, do plenty of tactics, learn basic endgames and openings, analyse post-mortem. Not much new to say. There are zillions of posts talking this. When I was 1200 I improved by watching youtube and playing a lot of standard games

Now I play a lot of Blitz in general because I don't have the time for lengthy games, do you think standard is better for improvement compared to 5 or 10 mins of blitz?
Title says it all, how to "git good" ASAP? Long term plans or ideas are also greatly appreciated. Also keep in mind I have a limited amount of $ to contribute to chess. Thanks!