First, his election would be a wind of change and would promote more economic activity. If we get economic conservatives into the House and Senate - in particular, if R's win the Senate - the change is going to be impressive and we are going to start seeing some new hires, etc. Right away.
Secondly, all he'd have to do is approve the Keystone pipeline and about ten states along with two industries (oil and construction) would catch fire.
Thirdly, if Obamacare is overturned or effectively unfunded, this economy is going to start to roar.
Fourth, serious tax reform (needs a decent Congress) could unleash investments and encourage spending.
Fifth, the removal of onerous regulation, particularly on coal and investment banking, would put a foundation on for a long, long term of prosperity.
It is REALLY not hard to do - it is all tried and true common sense - and my only explanation for why O doesn't do any of the above is, he wants the country to fail.