Network, network, network. Look out for short courses and workshops that can help tailor a general degree to fit a specific occupation. Great marks will guarantee entrance into a professional or graduate program. There are few guarantees in the academic game. While great marks are a good start, sometimes they just aren't enough.
Every student needs one.
Take, for example, the case of Lisa. An excellent student, she applied for a graduate school clinical psychology program and was unable to secure admission. The next year, she implemented Plan B by looking at more schools and by including counselling psychology programs. Three offers, complete with scholarships. Remain mobile, if possible, and keep your options open.