I believe all visitors of this site and forum would agree a better world would be a more conscious, compassionate, free, sustainable and joyful world. One idea that we could start off with would be to create our own exchange system.
Here is a good site (although a little old with broken links) describing alternative exchange systems.
If we have a diverse enough group we can have a complete economy. That is if the participants compose a group that can provide all the skills and resources necessary for basic needs we will be self sufficient. From there we can grow faster and more efficiently for the following reasons:
1. All exchanges would be untaxed. We'd be cutting national governments out of the picture. We would have full control of our resources.
2. We can design the currency to maximize sustainability. National currencies use interest rates to drive competition and keep us living in a scarcity paradigm. As an illustration, what happened to the interest rates in the US during the recession starting around 2001? They dropped so as to encourage spending. When the economy is good, they rise to encourage hoarding of cash. If we lower interest rates or even charge for holding on to money, what happens? People invest in sustainable resources, such as fruit and nut trees for example!
3. The participants will not be driven by greed, but rather common goals including compassion and abundance for all. We will be more efficient than the economies operating with national currency because competition results in redundancy in effort and in people working without motivation merely to keep up with the status quo whereas everyone working together on unique projects results in meaningful work and maximum overall contribution.
I can't think of a better way to kick off this initiative than to organize an exchange system based on an abundance for all paradigm.