This time management methodology, Getting Things Done , involves a notion of prioritizing things that needs to be done immediately. Really brief tasks should be handled without adding bureaucracy. Other things should be written down and get scheduled such that you don't need to worry about them until you're planning to work on them.
Going beyond that, the guy who coined the term, David Allen, seems to be associated with a sort of new-agey cult, so it might not be an entirely wonderful idea to get too directly/intimately involved with exploring the methodology so deeply that you'd want to get help "from the horse's mouth." Fortunately, a lot of the principles are fairly much common sense...
There are a number of web sites and blogs that promote GTD-related methodologies:
One of the GTD concepts is to have 43 file folders: one for each of the 31 days a month may have, plus one for each month. If you intend to defer action to a particular day in the coming month, then place the item in the folder for that day; items deferrable for later months are similarly placed in the folder for the appropriate month.
Open a daily folder each day, and a monthly one each month, and those items will be dealt with when they need to be.
Sysadmins are particularly challenged by issues of time management, as they get bombarded by enormous quantities of tasks that are often ill-understood by anyone.
There are various sorts of software specifically written to help people use the GTD methodology: