The real problem, from what I've seen, is that people who ARE good at their jobs ... aren't interested in politics. If someone were willing to run the country like an ethical business (and had some sense), that person would not get voted in, because the public wants you to tell them what they want to hear, not what the country really NEEDS.
If I were president (and I've only got, what, 4 years or so before I qualify?), I would work on, primarily, streamlining education and healthcare. It's no use complaining that there are no jobs if people simply can't fill them. I'd also put a stop to rewarding incompetence (coughbailoutcough). If it takes reality-show-like contests to get companies to want to work towards NEEDED goals, then let's go for it. I'd also want US companies who want to bail out on paying taxes or staying environmentally legal to sign over their control. In other words, if you think Mexico is such a better place ... move there and don't darken our door again. Don't continue to bask under the perks of this country if you don't want to follow its rules.
I also want to see a work ethic come back into style. There is really no motivation for the lowly cashier to not cheat on taxes, etc ... if the CEO of their company is doing it too. Why come into work when Congresspeople barely manage it? When I was a teacher, during our inservices, teachers would talk during the meetings, check their cellphones, etc. Well, NO WONDER the kids can't behave. I'd like to see a concerted effort in the PR department, getting people to enjoy working again. Yes, there will be bad days. But I'm willing to bet that if you fixed America's work ethic, obesity and tax evasion and healthcare and stuff would just naturally fit back together.