Taking something for a test drive before making a purchase creates a more informed consumer, unless it's a prostitute, in which case, that's assault, brotha! Letting you test drive criminal amounts of vino, TastingRoom.
Just now delivering to the Land of Lincoln, TR lets you vet grape hooch (grooch?) before committing to an entire bottle, sending sample packs from more than 30 notable West Coast partner wineries to replicate on-site tasting experiences, only you can do it on the couch in between napas. Kits come equipped with six 50ml bottles -- extracted from a 750ml bottle in a zero-oxygen chamber to ensure no quality loss -- that the winemakers've selected and arranged in the proper sampling order, and come complete with tasting notes, though you don't need some fancy pants instructions to tell YOU how to mix up a Voltron of wine. There're loads of vineyard-specific options (many otherwise avail only in Cali), from Sonoma's Peterson winery, to Napa's Grgich Hills, plus multi-vineyard packs with themes including hidden gems from small vineyards, wines for cheese lovers, and red essentials, though hopefully they poke some airholes in there for Joey Votto.
Even their website's a treasure trove of further oenophile odds and ends, boasting instructional articles, virtual vineyard tours, and pairing advice, e.g., just make with the money.