The highly impractical:
-- Hurl really big stuff through the air with a giant trebuchet. You know, like, a car or something.
-- Skydive from low-Earth orbit.
-- Witness an actual nuclear explosion without burning my eyes out and/or dying.
-- Drive a monster truck through Walmart's very full parking lot.
-- Float down the entire length of the Amazon.
-- Climb Olympus Mons and hike the length of the Valles Marineris on Mars.
Okay, let's talk superpowers:
-- Read people's minds at my own discretion.
-- Be invisible when I want to be.
-- Fly like Superman -- you know, just think about moving in a third dimension and actually doing it.
-- Run like the Flash without my clothes getting ripped off by the speed.
-- Walk through walls without falling through floors.
-- Travel back in time to see anything from the past (and change the timeline! or maybe not ...).
-- Okay, with that, I think I need to add: experience divergent timelines -- you know, all the "what ifs" of my life.
-- Safely teleport myself anywhere I want to go -- even to other planets.
-- Be invicible/immortal (until I'm ready to move on, of course).
-- And what good would that be unless I could help other people be the same way (life wouldn't be very good without my dear wife and kids and friends ... and their friends).
-- Use my awesome mind powers to, you know, make people do the right thing.
-- Reverse entropy.
-- Know everything without going nuts.
The comparatively "ho-hum" but more achievable stuff:
-- Visit the Great Wall of China.
-- Climb the Pyramids of Giza (though, really, flying around them would be better).
-- Climb the Mayan ruins.
-- Learn how to fence.
-- Learn how to surf, and ride some really big waves.
-- Have enough money to never worry about it again.