While on campus, try to gain experience working or volunteering on research projects of your professors even if this initially means washing dishes. These courses will provide a more well rounded appearance to your academic career and help you demonstrate to your employer that you are a serious developing professional. Many of these journals are supported by a professional society. Members of that society get the journal and newsletter. These publications allow you to keep up with changes in the field and also job openings while demonstrating that you are in fact interested in the field.
Most societies have a special student rate as well.
Carefully craft your cover letter and curriculum vitae to demonstrate a logical progression in your growth as a professional. Your letter should be the very best that you are capable of writing. Make use of the writing center and career services office. This may mean taking a suboptimal position initially but it gives you experience and perhaps the chance to obtain a more permanent position. View each position as an opportunity not as a demeaning position that is not dignified enough for you.