The pre-sale for season ticket holders has ended, and as of today all fans can buy individual game tickets for Sacramento Kings games. Kings.com or the box office out in Natomas. You know the drill.
One note on the season opener against the Lakers: there are no available individual tickets right now. All remaining seats are tied up in the four-game Back in Black bundles that gets you into the first four games of the season. So as of now, if you want into that first game and you don't have season tickets, you need to buy the Back in Black package or trawl the secondary markets.