Is it bad that I initially misread this as omni-science, rather than being all-knowing? I could probably do quite a bit with a sufficiently advanced technology...
Anyway, if I am omnipotent I can make myself omniscient. And after I decide to lift the stone I've made that's too heavy for me to lift because omnipotence trumps logic and causality, I'll make a new version of humanity where the components are not quite so prone to unfortunate errors, breakage, and purported design flaws. Still going to leave mortality in there and make allowance for the postmortem existence and transfer of consciousness to another plane of reality. Heck, might even make it so you can shuffle back and forth from time to time, we'll call it reincarnation.
I'll just make sure that there's solid, unquestionable proof of it.