Over two million Australians are classified as casual workers, which is approximately one in four employees, one of the highest rates in the OECD. Casual jobs often involve evening or weekend work, so if you don't mind working while your friends are socialising it might be worth it for that extra pay.
Working a casual job is also a great way to try out careers that you think you might be interested in and hone some extra skills for your CV. Most casual roles are in retail and hospitality. Bear in mind that casual workers do face more unpredictability with their employment and they are not entitled to holiday pay or sick leave. However, casual work does offer the possibility of fitting a job around your studies and some people prefer the extra cash to leave entitlements. Casual employers are also more willing to give unskilled candidates a go, often without any relevant qualifications. This can be a great opportunity for people without tertiary education to prove themselves and move up the ladder through solid performance at work. Another benefit is the flexibility usually found in casual roles, including the ability to increase or reduce hours if required.
As always, you'll need to show diligence, work hard and have a great work ethic to make your foray into working as a casual a success. If you're going into retail or hospitality you should be prepared for both quiet and busy times and to deal with all different types of customers, including cranky ones! You might need to work within a team to achieve common goals and may need to be flexible with when you're available to work to meet the needs of the business.