I played it like crazy for the last few months, though I did actually spend a little time in (of all places) Disney's Toontown when it got too much, and I prepared for the end by making a Champions Online account.
I spent more and more time in CoH as it got closer to the end, and I was on near-constantly for the last week, finishing up characters (including getting my first-ever character, an Elec/Elec Blaster I'd neglected for too long, to 50) and playing my favorites.
When the game went down, I was logged into my favorite character, my proudly-villainous Bots/Storm Mastermind, standing in front of Lord Recluse's statue in Grandville.
I miss the game every day.