i'm working on this too. i've had them off-and-on for years, but this whole "hnn fuck tech tool cool for flip tricks big wheels shaped boards loose trucks etcetc" attitude crippled me, and probably prevented me from developing a whole lot more flip tricks i'd love to have. i feel like they tend to go away a lot faster than any other trick if you don't do them constantly.
only advice i can really offer is to not half-ass it, which has already been said. do a bunch of stuff, get less fat, get more stable/flexible.