You can get great exposure for animal rights issues by writing letters to the editor. Make it a point to read your campus newspaper, as well as local newspapers and magazines, for articles that provide fuel for a letter to the editor. Sometimes one short, pithy paragraph is enough.
Editors are less likely to print long letters.
Make the first sentence catchy, so it will get the reader's attention, and stick to one issue. The letter should be timely. Avoid self-righteous language and exaggeration. Readers may dismiss arguments if they feel preached to or if the writer sounds hysterical. Only a heartless sadist could continue to eat animals when any fool knows their lives are snuffed out in screaming agony for the satisfaction of people who can't be bothered to take a moral stand.