Oh man. This answer reflects more of the mid-2000s but still pretty applicable: AIM (a lot of thought went into crafting "away messages" which were auto-replies you set when leaving the computer), malls + movie theaters, the advent of MySpace was pretty big (your "top 8" friends could be a big deal). Drinking at someone's house.

Anybody near Bucks remember NAC dances? This thread just unlocked a core memory of grinding with my first gf to 50 Cent lmfao.