Buying on a game to game basis when I feel like going down to a game. Might scoop up some single game tickets during the first day of ticket sales to some of the bigger games like the Home Opener, Canada Day game, and some premium weekend games in the summer. Otherwise, for games in April/May & most weeknight games, I'll just buy tickets for less off StubHub.
Also, looking to go to Chicago in August to see the Cubs series, so will be trying to buy those the first day when Cubs tickets go on sale in February.