Well, all the official ways, anyway – and assuming you don’t want to check out the view from the Wrigley Rooftops.
Single game tickets go on sale February 25th on the web (cubs.com, starting at 10am CST), on the phone (1-800-THE-CUBS for Illinois residents, 866-652-2827 for out-of-staters, starting at 10am CST), or at the Wrigley Field box office (8am CST, but get your wristband on the 21st or 22nd between 8am and 10 am CST).
As they did last year, the Cubs will offer you the privilege of paying a 20% premium (15% for MasterCard users) on February 23 to buy tickets a couple days before everyone else. The pre-sale starts at noon CST.
And then you’ve got the pick-packs. The Cubs had already announced the Pick 13 plan, which goes on sale this Monday, but now the Cubs have added a Pick 6 plan, which goes on sale this Friday at noon CST on cubs.com. For $97 (plus a bajillion in taxes that the Cubs will never see), you get to pick a six-game set out of a group of 10 preselected six-game sets.