For education workers, Libcom.org have plenty of tips on workplace organising, including discussion of the various forms of direct action in the workplace like the wildcat strike, the go-slow, the good work strike, the sick-out, lighting strikes, sit-down, and work-to-rule. If you're organising your workplace, you might want to have a look at Solfed's leaflet on Stuff your boss doesn't want you to know and the Health and Safety at work guide.
University occupations are a common form of direct action taken by students - most recently the wave of occupations to protest against the attack on Gaza in January 2009 and the school occupations in Lewisham and Glasgow. Lessons on how to save your school from closure were learnt from the latter. The guide to hospital occupations might be useful too. Demonstrations are another common response. While occupying or demonstrating you may come across other issues, like how to blockade the area you've occupied, how to get your actions in the media (see below), and perhaps even how to deal with the police, with more info from the activists' legal project. See also the SchNEWS beginners guide to blockading (link to pdf).
If you first need to start up a broad campaign at your university but hesitate because you feel inexperienced, the Seeds For Change Network give advice on plenty of things, including the basics of facilitating meetings and taking minutes. SchNEWS have useful documents too, such as tips on how to set up a newsletter, organising meetings, how to campaign. Though he's politically somewhat objectionable, George Monbiot's activists' media guide gives plenty of good information of how to get the most out of your dealings with the media, as do Seeds for Change and libcom.org. guide to writing a press release. The Solidarity Federation's Skills for Action is a guide to effective communication such as public speaking and writing skills.