Contact your college office for assistance. In most cases you should first try to resolve the issue with the professor. The Student Advocacy Center may also be able to assist you.
Contact your Residence Hall Advisor or Hall Director.
Start with the Dennis Learning Center: http://dennislearningcenter.osu.edu/index.asp.
Search on this site: http://www.osu.edu/academics/a-z.php.
There are numerous ways to get involved. Check out the over 1,000 student organizations at Ohio State: http://ohiounion.osu.edu/get_involved/student_organizations.
Career Connection offers assistance with resumes, mock interviews and other career planning needs: http://careerconnection.osu.edu/.