The following are resources that I've found useful at various points during my mathematical career.

Conference Listings
Software/Templates
Lecture Notes, Expository Articles, and Open Questions
  • Anton Geraschenko has good notes from classes and workshops he's attended.
  • Milne has very good course notes on various number theory topics.
  • Bjorn Poonen's expository articles and class notes have been very useful.
  • I found this list of open questions from the AIM conference "Rational and integral points on higher dimensional varieties" useful when looking for a research problem. The notes from the conference are here.
Academic Advice
Study Guides for the Qualifying Exam