I clear intersections to the right for my partner if I'm riding or focus on not wadding up the ambulance if I'm driving.
There's no reason to get pumped up before a call, if anything you should be calming yourself down.
I do have a "ritual" at the start of every shift. Well I guess you could call it that. I have a very specific order of doing things when I get to work. Leave my house at 0545, get to work at 0600, put my crap in the unit, check the warmer to make sure there are 2 NS bags and tubing in it, strap the IV caddy in, turn on the onboard O2, check the cot for a mega-mover, a blanket and a pillow, joke around with coworkers, grab the first out bag and airway bag, check the portable O2 cylinder to make sure it has air in it, goof around with coworkers some more, clock in, check out the monitor, radios, gurney battery and toughbook, even more goofing around with coworkers, maybe flirt with the cute VST if she's working, check the monitor to make sure it's good to go. More goofing off. Sit on my *** waiting for my partner then when he gets there we check narcs out of the Pyxis machine, talk to crews coming off the street to find out if it's busy, goof around with them, make it a pain in the butt for them to finish their shift (if they are a friend) take a leak further disrupt my friends EOS tasks and tell dispatch we are in-service for the day then drive to our post and pass out for another couple of hours or start running back to back calls. Recently it's been back to back calls rather than passing out for a while.
I don't know if that counts as a ritual.