DON'T LEAVE SCHOOL WITHOUT A SPECIFIC SKILL SET!!!!
As a start, I suggest basic stats, program R, ArcGIS, Wetland Delineation, Field techniques skills (trapping, handling, etc.), and database management.
STATS: http://www.statsoft.com/Textbook/Elementary-Statistics-Concepts/button/1
R: https://www.youtube.com/playlist?list=PLFAYD0dt5xCzTQHDhMPZwBoaAXWeVhZzg
R: http://swirlstats.com/students.html
ArcGIS: http://hcl.harvard.edu/libraries/maps/gis/tutorials.html
ArcGIS: http://ocw.mit.edu/courses/urban-studies-and-planning/11-521-spatial-database-management-and-advanced-geographic-information-systems-spring-2003/index.htm
ArcGIS: http://training.esri.com/gateway/index.cfm?fa=search.results&searchterm=&search=Search&cannedsearch=2&OrderBy=CourseTitle%20asc&AllPage=All
Graduate School Information:
The majority of graduate schools that have a "Wildlife" program (often called wildlife or natural resources) provide tuition remission AND a monthly salary/stipend. This is usually referred to as a GA [graduate assistant]/GRA [graduate research assistant]/GTA [graduate teaching assistant]. GTA's require that you help teach a class to get your tuition remission and your stipend. If you are applying to a school without a pre-arranged GA, most departments have a few TA lines of funding available if you can figure out a project.
Here are some links at prominent wildlife schools that discuss a thesis (MS) or dissertation-based (PhD) program [NOT A CERTIFICATE, etc]:
http://forestandwildlifeecology.wisc.edu/graduate-study-application-process
http://www.montana.edu/ecology/gradinfo.html (see assistantship at bottom)
http://www.auburn.edu/academic/cosam/departments/biology/grad/information/
Good Graduate Schools:
There are many great graduate schools. However, depending on your interests, other schools may be better. For this reason, the faculty mentor you work with is just as, if not more than, important as the school you attend.
