Also - it sounds obvious, but perhaps the most important advice of of all is: don't hit your head again. You have to find a way to live "head safe" (as I like to call it). I'm always amazed when I read about people slowly recovering from months-long PCS who are seriously thinking of trying their luck again at boxing, rugby, soccer, hockey, etc.

Another thing. It's best to avoid severe overexertion (going from minimal physical activity to, for example, heavy lifting, bodychecking, jarring running, etc). The strain from doing this can really set you back. You have to up the activity very, very gradually - and then only after getting enough rest during the acute phase of recovery.