I don’t think a mere President could accomplish some of the things other posters have listed; might be better to arrange to crowned as an absolute monarch. Were I such, I would
legalize industrial hemp,
legalize marijuana,
decriminalize hard drugs,
repeal the global gag rule,
scrap that absinence only nonsence,
bring all public schools up to the level of the best public schools now existing,
see to it that every qualified kid who wants to attend college gets to do so,
have a real space program,
lower the drinking age to 16,
make the marijuana age 16,
make the federal govt butt out of matters more properly left to the states (this would include leaving gun regulation completely in the hands of the states).
stop spending money on highways,
start spending money on mass transit,
make drivers lisences harder to get and easier to lose, in order to see to it that people who are not capable of being safe drivers do not get to drive,
eliminate corporate welfare,
change welfare for the poor: no deadline to get off, instead help to get off, in the form of education, job training, etc. (including child care provisions, so they can attend the job training, etc),
see to it that abortion is legal, easily obtainable, and affordable for all, regardless of age (free for low income women), while working to reduce the need for it via better, earlier contraception ed, research into improved contraceptive methods, improved access to contraception,
outlaw “sin” taxes and sales taxes,
redesign the income tax. Eliminate the loopholes and favoritism that allow large businesses and rich and powerful individuals to avoid paying their fair share. Make it simple, straightforward, easy to understand. Add a “negative income tax” whereby people with very low incomes get payments to bring them up to enough income to live on.
Inexpensive housing is virtually non-existant. I’d find out why and change or eliminate whqtever laws and policies are causing or worsening the situation.
Redesign foreign aid. No military aid to despots. Plenty of humanitarian aid where it’s needed. Especially medical aid to countries where babies and young children are dying of easily preventable causes. Set up plenty of clinics to provide health care, including contraception for all who want it.
In preparation for a return to democracy (after my long and glorious reign), I’d end govt support for Presidential nominating conventions. I’d scrap the Electoral College. We’d count the votes in each State. Each State would report its totals. We’d add 'em all up. Candidate with most votes wins – if he or she has 51% or more of the votes. If not, we have runoff between the two front runners. OR, we use instant runoff voting.
The military. I’d cease and disist from spending huge sums on weapons systems that don’t work and/or are not needed. I’d reduce the size of the military and give the enlisted personnel pay raises. I’d stop having permenent bases all over the world defending other counties against the “red menace” that actually does not exist any more.
I’d institute a crash program to invent time travel, then send a team back to 2000 to see to it that Florida has a fair and proper election. This would be much easier than trying to extricate us from the mess Bush and his advisors have gotten us into in Iraq.
Once my people have seen to it that the rightful winner is inagurated in 2000, I’d take a look a the record. If 9/11 had still occurred (on that or any other date), I’d send a team back to prevent it.