Sharing knowledge is tough; I don't think there's a silver bullet and everyone wishes they could do it better. Some strategies we use: - Mailing Lists - a collection of mailing lists people can subscribe to if they're interested in a topic. Bonus points if you dedupe messages, as it's kind of annoying to get the same message more than once. We BCC to avoid Reply-to-All discussions/arguments. - Discussion board - discourse... - Q&A - stack exchange like Q&A - Cross-team focus groups - these come in many flavours from "group level" (several teams sharing a common manager) to company wide. Some organise meetups/presentations that are really popular.

I'd encourage "all" of the above in some flavour or another, as people learn and teach differently.