Take BART, they're shuttling people back and forth to the site.
Be there as close to the start of the event as possible so you can see stuff that is not light based art better.
Wear layers of clothing, last night was pretty nice, but a tad chilly if you're ears are sensitive luckily I brought my ear muffs.
Bring ear plugs.
Take your headlamp for the port-a-potties.
Don't trip over the power cables.
Just so you know:
The are multiple ATM's so you can pick up cash there if you forget along the way.
There are 2 food vendors, I hear the crepes are great. . line was too long and the event was almost over by the time I decided I was hungry. . sigh. . .
Clothing vendors as well as fire and light toy vendors.