>First off, how do you prevent people from returning to a capitalist society, forming their own states or even ensure the core idea of equal distribution?

By virtue of people having better lives. They won't want to go back to wage slavery.

>What do you do when some start working more, produce desirable items and thus accumulate more wealth than others?

Nothing. You are free to accumulate as much wealth as you want.

If these answers were not the ones you've expected, may I suggest for your own personal edification and intellectual nourishment to go and read as much as possible with regards to anarcho syndicalism.

You seem to be operating under a series of misconceptions.