First of all good luck to you!! You shouldn't be nervous because the part that depended on you is over. What follows is beyond your control so it is simply not worth to waste time and energy thinking about it. You will be anxious, and you will check your e-mail A MILLION times, believe me. So, if I can give you some "tips", here they are:
* Most departments will be on winter break and will not resume work until January, probably around the 7th. Until then, your application hasn't even been seen by your POI. So, like them, just relax and enjoy the holidays.
* My two-month wait was hectic in many ways, but something that kept me "on track" was doing sports and reading for fun. If you don't like either of these, you can try holding on to a hobby or keeping yourself as busy as possible.
* Another "trick" is to avoid talking about applications unless someone asks you. I didn't do this but I know people that apply this to things they don't want to be anxious about.
Now that I read them, they are not very smart tips, but maybe you find them useful in some way.
About the 75 pages... Yeah, I don't think they will read the whole bunch. But I really don't know. I thought POIs read some pages only until the other day when my advisor made a reference to my writing sample. WTF? You've read it like a year ago! So, who knows?
All the best!!!
AP