Sure, sometimes before a tourn or signing up for a cash game, I'll put on my headband and scream "Banzai. . ., Banzai. . . , Banzai". Other times I put on my war paint, headdress and regalia then dance around the monitor pointing at the entries at the tourn list or at the cash game table. I've tried the Rocky or Creed training montage scenes but I usually get tired then go to sleep before the tourns starts and miss it so I pass on that now.
During a game, I worked on my needle work skills and made a dolls where I would write down people's Online IDs then tape it to the dolls and either held the doll to fire or stabbed it after they gave me bad beats but was reminded about some type of morality and that I might be taking the games too seriously.
But if I'm serious about a tourn or cash game, I'll stake the game out for awhile and take notes on the regulars before attempting it. When I finally decide to play then I'll review how to play an ABC123 game to keep my game on track like the day before and review the material like 2hours before I start playing.
I'll tell folks that I don't want to bothered during the tourn, turn everything off so I'm not distracted besides something that will keep me focused like music. Nothing silly like workout music or anything that would change my mood or influence how I play though. I'll eat and take care of any bathroom stuff before the tourn and have some Yum-Yums, snacky cakes and something to drink nearby so I don't have to wait for a break if I get an urge for that stuff. Then its just play time.