Getting Help
OpenStreetMap has several resources for learning about the project, asking and answering questions, and collaboratively discussing and documenting mapping topics.
Beginners' Guide
Community maintained guide for beginners.
help.openstreetmap.org
Ask a question or look up answers on OSM's question-and-answer site.
Mailing Lists
Ask a question or discuss interesting matters on a wide range of topical or regional mailing lists.
Forums
Questions and discussions for those that prefer a bulletin board style interface.
IRC
Interactive chat in many different languages and on many topics.
switch2osm
Help for companies and organisations switching to OpenStreetMap based maps and other services.
For Organizations
With an organization making plans for OpenStreetMap? Find what you need to know in the Welcome Mat.
wiki.openstreetmap.org
Browse the wiki for in-depth OSM documentation.