The first question to be answered is who spends it?
I think it fair to say almost everyone, whether Rep, Dem or Indie, agreed we needed a stim plan, but the initial and fundamental disagreement was who gets to spend it? The Dem's expressed concern that if it was people, they'ds just use the money to pay down debt and not spend it. So they went with government spending. I can agree to that to the extent it's real infrastructure improvements (not just freakin repaving type stuff). The complaint is that doesn't move quickly at all. But I still think it should done. (And yet it's the Dems who speak of don't "let perfect be the enemy of good", go figure).
Incentives need to heavily directed at small business; that's not been done at all despite promises by obama. Small businesses are the ones who hire etc. There are an awful lot of people who would like start a new small business, if only because they are unemployed (in fact, the IRS has reported a substanial increase in new small businesses because people can't find a job and have little other choice). A good way to help here is expanded SBA loans, regular banks aren't lending now. Target new SBA guaranteed loans for new small business that want to start up, or existing ones that want to expand. These just need to be guarantees, not subsidies. While some losses can be expected, it should be far less expensive as many will be able to pay back the money.
You'd also want to encourage investment in equipment, software and employees etc. You're incentivizing productivity and employment. Accelerated deductions and credits for new employees (that's cheaper than unemployment and welfare type benefits) targeted at small business would, I think, be enormously helpful.
That should be enough for a damn good start.
Fern