I would go with these fields:
Discrete Math, Linear Algebra,
Combinatorics, Probability and
Statistics, Graph Theory, mathematical logic.
This would give you a grip on most fields of CS. If you want to go into special fields, you have to dive into some areas especially:
Computer graphics -> Linear Algebra
Gaming -> Linear Algebra, Physics
Computer Linguistics -> Statistics, Graph Theory
AI -> Statistics, Stochastics, Logic, Graph Theory
You will of course have found these entries: blogs to freshen up my math in practice and math programming and learning. They will have some advice.
Other then that get yourself some good basic books on linear algebra and logic. Sedgewick has some good books on algorithms with the basic math concepts. John Vince has one on match concepts for computer graphics.
