I suggest equipping yourself with some mathematical computation software. Mathematica is my favorite. There are some free, opensource alternatives like ipython

I suggest equipping yourself with some mathematical computation software. Mathematica is my favorite. There are some free, opensource alternatives like ipython which seems to be pretty popular lately. It helps to grasp things much more quickly by simply playing around with stuff. And you also get to write some code as a bonus. Say when I was learning economics I'd simply code all the concepts and charts in Mathematica and then play around with different input values to see what happens. mathworld.wolfram.com is a great resource for understanding mathematical concepts, very short, fairly formal descriptions with references. Helps to expose yourself to mathematical language even if you're confused at first. Wikipedia articles tend to be too long and all over the place.