I'm working on it, I got a four-step plan and everything.
1) Create A.I, thus breaching the Technological Singularity and ushering a new age of enlightenment.
2) Pave the way for the full automation of our manufacturing industries through Robotics and aforementioned A.I.
3) Fix energy problem. Short-term: Get away from Fossil Fuels. Long-term: the creation of a new energy source that is renewable, relatively cheap and portable without the major loss in energy. (Currently there is no way to "save" energy, it is directed to areas and if the grid isn't fully utilizing the output than the energy is lost.)
4) Fix supply problem. Without a financial economy there will be a problem with demand, we won't have to cut back and watch what we get. I feel the solution would be to investigate altering Sub-Atomic particles, particularly that of waste. Think of it as a new way of recycling, that banana peel can now become something else, depending on the desire.
After those are established, it would be feasible but there would still be a ton of problems. Law Enforcement would be difficult when many officers would quit there jobs if it were no longer required to make a living, and if our laws were left in place as they are now we would have a serious problem enforcing any of them with a straight face.
The education system would need massive revisions as well, I shan't dive into that because it's late and I don't want to stir a debate, but I find even the school systems in some European countries (Which supposedly have the best schools in the world) to be lacking.
Honestly I think one of the biggest problems would be IP rights. After we eliminate currency, what differentiates fan fiction from the actual product? Should only the original creator be allowed to muddle about in his/her universe? Must they be consulted each and every time somebody has an idea and have to greenlight it? Or could we allow anyone to work on any IP, and let the fans decide which are worthy of achieving canon status.
Lots of difficulties in this endeavor, but it will be worth it. Starting to learn programming now. You're all welcome.