There's a feature article in this month's CILIP Update magazine all about the outreach work of the Hoyle Project at St John's College Cambridge. It was written to let people know about some of the things the Project achieved, and also includes some hints and tips for organising your own events. I don't think anything in it is rocket science, but I hope that it inspires more libraries and special collections to try some work with the public and see what happens!
The article is on pp. 40-42 of the April issue of Update. Logged-in CILIP members can access that online, and it'll also be delivered in hard copy.