What to do with a degree in Biology:
This website has a large number of resources for mentoring and professional development opportunities.
Careers for PhDs in Science: State of the Field for Microbiologists blog has a nice summary of where people with PhDs in Microbiology work.
The American Society for Biochemistry and Molecular Biology has a great website with career advice and videos, grant writing advice, and links to workshops and funding resources.
How to find biology related jobs:
A list of Ecology and Evolution jobs is maintained on a google sheet that anyone can contribute to.
The EvolDir is a listserve that often lists jobs in Evolution.
EcoLog is a listserve that often lists jobs in ecology.
How to get a PhD in STEM:
PLOS has a nice collection of advice for scientists at varying stages of their career, from undergraduates through PIs.
This toolkit has some great templates for planning your PhD