There are a number of very useful websites with information on careers.
Course Camel provides information on courses for students at all levels of study.
My Big Tomorrow provides information and video links on specific career information, prerequisite subjects for courses. It also has features which assist students who don't know which career they wish to pursue at this stage.
My Future starts with the basics (go to university, go straight to the workforce etc.)
Job Outlook describes what's involved in various occupations, outlines job prospects and potential earnings.
Job Guide offers useful information about how to work out what occupations suit you best, based on your interests and abilities.
To get up to date information on job prospects and skills in demand check the following websites