Assuming we're talking absolute omnipotence (the way God is usually represented) and removing any possible burdens (because the Big Man makes it look easy), that leaves the recipient of power (me!) akin to a small child who just walked into a huge dark room, and someone flipped on the light. Blind, confused, and likely frightened, I would fap in the corner as my psyche struggled to get a grip (you know, like Jim Carrey in Bruce Almighty, just less PG)
Following that, I would stay true to my human upbringing, give in to avarice, and abuse the powers of an almighty being to poke and prod the human ant farm until it can sustain no more and simply collapses...
But only after I hit QuickSave.
Hey, God, remember?
No speculations will be made regarding aliens, alternate dimensions, afterlife, etc. Being given one's powers does not confer equal understanding. I'm just saying what would likely happen with me...