Well I seem to no use the at command enough as I always forget how to use it and then learn and realise how simple and forget again. Here is a link to a small tut for it [small is all you need].
http://www.linux.com/articles/54254
For a quick hint without leaving this page to follow the links, you simply type in at followed by the time/date and then hit enter, THEN enter your commands, spanned over several lines if you like and then CTRL+D or EOL. Too easy!