First, don't do the
things that destroy community.
Next, read Art Of Community and
WikiPatterns for wisdom, tips, and tricks from other communities.
Conduct your wiki activities according to the
Leadership Code of Conduct. Help others, be nice.
Also communicate, a lot.
Luciano Lima [MVP] Brazil edited Revision 14. Comment: Added link of the article Wiki: Como Construir uma Comunidade (pt-BR).
Ed Price - MSFT edited Revision 15. Comment: Added Spanish