I grow a gnarly beard once they clinch the playoffs and don't comb or cut my hair (my wife hates it)
On game day i start with 45 minute cardio workout (usually an hour before game time sometimes i try to convince my wife for a quickie, i mostly fail) this calms me down so i don't get enraged or break the remote. I have a case of beer cans with my frosted habs beer mug, my personalized jersey, hab slippers and habs fur blanket. I have my tablet on tsn for other hockey updates and cell phone to heckle my buddies (sens fan buddies in this case).
My beer can only gets cracked exactly on puck drop.
Nothing special but we all have our quirks!
P.S my wife is a lovely good humored person, she just really hates playoff time because i get crazy :)