By 'our own systems" are you referring to a Wog economy?
Call it whatever you like. It's merely operating on your own terms.
Developing a system is really as simple as discovering the origins of real 'money' and putting those to practice.
Real money has to be:
1. A common means of exchange
2. Related to human labor
3. Scarce (somewhat optional)
More details on this thread:
http://smf.rantradio.com/rantvideo-general/videos-on-the-federal-reserve/0/Any easily exchangeable commodity would be sufficient to use as money - it could be coffee, rice, beans, gold, silver, ammunition, whatever. Food specifically of any kind is also a good idea.
Otherwise, people can use trade (direct exchange) if they want, but generally a common means (money) will always arise in the market.
The easiest way of starting this is to stop using FRNs or other fiat currency in your transactions with your friends and family. Don't ask for money, ask for trade in rice or some other commodity or hours of labor.
There are online ways of exchanging the ownership of gold electronically, that might be of interest to some people.