Refrain from buying so much fabric for the "stash". Buy for specific projects, then actually complete some of those projects before buying more!
Invest instead in better equipment -- an Accuquilt Studio, if you can afford it, or the newer electric Accuquilt Go! Being able to cut pieces precisely faster will allow you to make a lot more quilts.
Don't be afraid to machine quilt some of your creations. Actually starting to machine quilt is more important than being able to machine quilt perfectly.