For computer code etc. you could use an noformat tag before and after e.g.
The note tag before and after produces an exclamation mark:
Watch out for this!
A tip tag before and after produces a handsome green tick:
This was done.
A good general overview may be found at: \[http://www.atlassian.com/software/confluence/webinar.jsp\]
UCL specific documentation is here: \[http://wiki.ucl.ac.uk/display/AboutWiki/About+the+UCL+Wiki\]
For detailed documentation, see: \[http://confluence.atlassian.com/display/DOC/Confluence+Documentation+Home\]
Do not save your pages too often, as this creates many versions.
Do not leave pages open in Edit mode for a long time, as this puts a heavy load on the server.