Seriously, I'm saying this to everyone, if you get a chance to go to one of the last two, go.
Causeway tickets are the best way (that's where I was), you enter a lottery to be allowed to purchase them but if you get selected in the lottery they're not that expensive ($50/each). I was only about 6 miles from the launch site (Launch Pad 39A if anyone is interested), and it's the closest the public can get to see a launch. Apparently there's good views from the Space Center itself (about 10 miles away) and then again from Titusville (12 miles away) and Cocoa beach.
Forget being an impressive sight (which it is) or even an educational day out (the Space Center is fantastic and worth visiting by itself). It's a genuinely perspective-changing event, to see that ship rise. Really like nothing else on earth.
Some interesting numbers for the speed freaks amongst us. By the time the Shuttle clears the tower (see my photo labelled "Tower Cleared!") it's already doing 200mph. At 2 minutes in, it's doing close to three thousand mph. By the time the ship reaches escape velocity, about seven minutes in, it's doing close to seventeen thousand miles per hour. Bit faster than the fastest toy on this forum; faster even than Hedge's Vulcan.