I simply made a typo. I tried to type 500, iPhone keyboards are stupid.
Fine. Step 1: Pick a method. After that, it's honestly just practice! I was on and off sub 2 because I had a mediocre 4x4 and I didn't practice it much. I started practicing and I finally chose a "real" 4x4 method a few weeks ago when I got my WeiSu, now I'm almost sub 1. There is no magic tip. Any advice that can be given for sub 1 will almost surely apply to those trying to make sub 2 or sub 3.