What are you looking for?
"What are you going to do with a degree in that?" Does this question sound familiar?
To ensure that you can write the best cover letter possible and have the best interview possible, it's a good idea to develop an overall business understanding of the industry, business type, and workplace you're applying to.
Through your network at uni and through other relationships, you can wise up to your skills, find out what's going on in an industry, and learn about openings on the job market.
Can you afford to be googled?