This is something you might not think about too much yourself, but it is an important aspect. When you have an idea about your wishes for your years after graduating, your supervisor might be able to recommend some courses to improve your skills (not necessarily scientific!) for your future career or could contact you with interesting people in his/her network.
The Faculty of Science’s Career Service officer is Thomas Geydan . Feel free to drop by and see him or send an email if you have any questions about your career.