New design and sustainability webpage

I did a complete revamp of the sustainability and design website I founded, with improved information organization and features. 
This allowed me to take my Wordpress design and configuration knowledge to a new level.

Since I founded a blog on Sustainability and Design in september 2010 I´ve learned a lot and the project has expanded.

It grew so much that I quickly learned it was limited by the platform that I chose to start with: Blogger. While blogger is quite versatile and very easy to configure, it is pretty limited in how you can structure the information.

This leads to difficulties in SEO (search engine optimization) strategies and makes it difficult to highlight a good selection of important content. So I decided that it was time to get our own hosting and took a weekend off to get it running.

This has been a valuable lesson; I´d have saved countless hours and the site would have grown quicker had I made the extra sacrifice at the beginning to do things to a higher standard.

The site now structures the information in a much more user friendly way, as well as implementing silo structures to improve SEO of selected categories. It also has a forum to improve communication between the different people that collaborate in creating the content.

Creating the new site and transferring the content without losing search engine rankings has allowed me to take my knowledge of WordPress, SEO and website configuration on the server side to a new level.

Now my major challenge for the project is to maintain and grow an enthusiastic team of collaborators, as I intend to limit myself more to the back end than publishing.

Any tips to increase motivation and implication in volunteer based teams?