There’s a point in the first year of econ grad school where you switch from “yeah, I’m in grad school” to “OMG!!!11!! How am I going to live through all this formalization!”
For me that moment came about 10 minutes into Prof. Silvestre’s first lecture, in the first micro theory course on the first day of classes. If I had opened up the required text for that class, MWG, before lecture, I may have had that sinking feeling even before I started grad school; this is assuming I would have started grad school school if I’d known what I was getting in to. In any case, these notes on the MWG text may help.
PS – Fellow UC Davis grad Matthew Pearson wrote these notes on surviving the first year.