The answer for everything

Is more bike paths and more bikes.

Ideally they should be stand-alone bike paths, not just painted lines.  With dividers between the bike traffic and cars.  There are miles and miles of these in Holland, and the benefits are obvious.

OK, maybe not the answer for "everything," but it will help a heckuva lot.  Less noise, less pollution, less money spent on gas (and the reliance on oil-producing countries and/or wars to control them), less obesity, more inclusive communities, safer streets, and so on.  Any city can benefit from this, as can suburbs and smaller towns.  It's only in really remote ares, where you have to drive two hours to a grocery store, where it won't be reaslistic.

I know right now bike paths may not seem like a big priority, but they should be.  They will create construction and planning jobs in the short run and provide all sorts of dividends in the near and long term.