This will be my second summer in my house-- last year I put in a veggie garden, and despite a somewhat late start due to having to clear a jungle of overgrown stuff and add fresh soil, it did quite well (especially tomatoes which I had continuously from late June to first frost in late October). This summer I'm adding fruits-- most won't produce for a few years so they're an investment in the future.
Spring still feels like a long way off here, but I've pre-ordered a bunch of things as dormant bare-root starts that will be delivered in late March (when at least in theory the ground will be thawed enough to plant them): raspberries (10), blueberries (2), wild plum (2), bush cherry (1), currant (1), grapes (2), rhubarb (2).
I also already have my veggie seeds for the season, and will start some things in the enclosed porch in March/early April.