To start you need to click on the windows Start orb. Then RIGHT click on Computer and select "Manage". The Computer Management window will open, where you will see a tree node on the left called "System Tools" and below that "Task Scheduler". Open this node. Then Click on "Task Scheduler Library" where all your tasks will appear on the right. If you RIGHT click on the task it will give you option to export the task. Save it to an XML file as it prompts you.

These exported tasks can be backed up and later imported, or if you have made a useful one you want to share you could give it to a friend. Also good for IT support staff who could deploy tasks across their clients PC's
To export ALL your scheduled tasks you need to go into the DOS CMD prompt and maybe home users could play with this option if you can't access the Computer Management console. To get the CMD window you need to press the Windows key+R or go to the Start Orb and click on Run on the main menu. In there type CMD and press enter. A black command window will appear. In there you will probably find that the default location is: C:\Windows\System32. You do not want to work in this folder! Change it by typing CD \ and the full name of the folder you want to be in. For example I have a temp folder off of my C drive so I would type CD \temp
In this new folder location we can start playing... Type schtasks /query /xml > schedtasks.xml which will now dump all your Vista scheduled tasks to a file. The files name will be schedtasks.xml and it will be in XML format, which can be read by any text editor, even notepad.