Although the first two posts could possibly revitalize the economy, like Amsterdam, chances are it would severely hurt the majority of the population economically, like in Afghanistan and parts of Asia where Opium and Herion are prevalent and would probably digress into every other situation we have in most third world countries now, where a dictator or drug lord takes over. Bad ideas.. .mmmkay.
I would say it is difficult to do without outside aid if we are talking about a small country with little to no industrial development.
Chances are you would have to start off very small. Try to attract investors from outside the country (much like Japan did with America) to a natural resource. Possibly cheap work labor if no other resource exists (it is sad, but possibly a neccessity to bolster the economy). As the work population increases, I will try to attract more investors. I would also have to start building up security with a strong military. To try to stop corruption, I would have to slowly give the rights and power to the general population, but not before implementing free press. Without free press and education, the society will probably stumble and digress into poverty and unrest again because people would side with any new leader that would blame the problems on the current leader instead of using education and free press to figure out real issues.
**EDIT**
Also, any natural resources and land that is fertile, would either be farmed (not neccessary since I could trade with America for grain <which we have in abundance>). Or use as a tourist attraction. Either one will rape the environment and either strip the land or divert the natural water supply, but it will be for progress. A small amount of money will be easy to be put aside as money comes in to reverse this after the economy is good, and land resources can then be diverted back to the natural land. It all takes planning.
Because it would take more than 20 years to really fully develop a country, the first 15-20 years or so would probably be extremely tough. Most uneducated people will not understand this, but it has to be understood, otherwise they will revolt and all progress will fall short. That is why slow small amounts of money or freedoms would have to be allowed, not all at once, but slowly, to use as a way to control the people. When the economy is stable enough and people are relatively okay, full liberties and less sanctions would be given (probably by the demand of the people). This slow progression must be set on a schedule, otherwise even the incorruptable would be corrupted because when is the society ever perfect enough to grant more liberties. (Machiavelli's The Prince is key to understanding this notion). You must use these benefits with the best timing. Freedom of Press though is paramount and would be given first, but some favorable government propaganda would be good as well.