Free Parking Kills Cities
I've known this for a long time, but for most people living in the 'burbs, this is highly counterintuitive. Here's the latest article on why, if you want to have a city you actually WANT TO DO THINGS IN, free parking is the worst possible of all land uses.
Unfortunately, most of Austin's irresponsible inner-city neighborhoods (including the two in which I own property) still push for exactly the opposite - suburban-style off-street parking which end up killing street life and (gradually) the center-city in which we all live.
(An aside - my current neighborhood apparently pushed for increased parking requirements in mixed-use development on Guadalupe. It doesn't get any more brazen than that.)