Don't put too much weight on your GPA. Great academics are not controlling in getting a job.
Do your research. Go to the library--read up on the company on the internet. See if the company is in the social media.
Stay up on industry trends, the field in general.
Consider temp or short-term to get your foot in the proverbial door. Some temp agencies even offer helpful courses.
Don't limit yourself to jobs directly related to your degree.
Do not make the interview about you, how much you need the job. Talk about how you can be an asset to the company.
Dress appropriately and be enthusiastic.
Don't focus on salary to decide yes or no. There may be other considerations.
And don't take the wrong job just to work.