Benjamin Franklin said: "By failing to prepare, you are preparing to fail."
First, you need to understand what you would like to achieve. Sit down and think about it, write it down if needed. Is these something you are very good at? What is the area of your expertise? Do you have a preferred employer? What type of work are you looking for? Are you looking for a long-term assignment? Know your skills, know your strengths, be aware of your development opportunities and work on them. Prepare for the interview, learn about the job, about the company, ask questions related to the position. If possible, familiarize yourself with the position - e.g. if you know someone in the job, or in the company, talk to them prior to the interview. Have an updated resume and be prepared to answer questions in regard to your previous experience. Prepare examples that relate to what the company is looking for in the candidate. Be on time for the interview. Know what your value is - do not underestimate yourself, but also do not overestimate yourself. Be open, honest, positive, friendly and professional and dress professionally as well.
Tip 1 - Diversify: Get involved in different activities. These activities could be around your community, in your school, or even a part time job. This will help you meet new people and get different perspectives on life and the world that may be different than what you are used to.
Tip 2 - Always keep learning: Even after graduation don't be afraid to go back to school. You don't have to go back for 2 or 4 years but Certificates are a great way to build you portfolio and gain experience.
Tip 3 - Never burn bridges: You never know when someone from a past experience can come back into your life so never burn a bridge.