You have to evaluate yourself before doing anything else. Know your potential abilities, interests and behavioural tendencies.
Take a second opinion from your class fellows, friends and teachers about your analysis. You might think you are good for something but your peers are in a position to judge you objectively, so take their feedback into consideration.
You need to understand the job market and know its requirements. Research different jobs and their demands. You might need professional help in this direction so it is best to turn to career counsellors, as they can give you some important advice in this regard.
Set your goals, know what you want in the short and long term, and then strive for the target which you have set.
You need to identify the skill sets vital to achieve your goals. Reaching your goals is always difficult; it is going to be a tough road but you need to be patient and determined enough not to lose focus.
Identify your flaws and work hard to remove them as they will hinder your quest towards your goals.
Once you have acquired a job, it does not mean that you stop; you need to keep evolving in order to survive and secure your future. Never close the doors of learning on yourself.
Be a good listener and learn from what you hear.
It is imperative for you to fulfill your responsibilities in your current job as this might later help you start a new career.
Take initiatives and talk to your supervisor to suggest improvements. If you prove to be a valuable employee it might help you begin a new career within that organisation.
Build a network of connections as 50% of all jobs are obtained from contacts. Maintain and build contacts in order to discover future careers.