1. Ensure that you are tailoring your resume to the job you are applying for. Pull out the experiences you had in school or volunteering that tie to the job you are applying for.
2. If you have the means and the time, find a volunteer position that is similar to the full time position you are looking for. When I first started looking for jobs I wanted to be an admin assistant, but had no experience, so I volunteered at the Alzheimer's Association as their admin to gain the skills needed. It was only about 5 hours a week, but I was able to translate that experience into a full time job with a for-profit company.
3. Ensure that the content and structure of the resume is strong. Your resume should be clean, well aligned, and should leverage strong action verbs, innumerate on your successes, and demonstrate the outcomes you drove.
4. Include a cover letter. This will demonstrate your dedication, and also gives the potential employer a sense of who you are as a person.