People tend to check in during these times:
Make sure at this stop you go strait to the middle of the car .
Around 9am seems to be rush hour headed to Manhattan. Be prepared to wait out a couple trains or be a NY sardine
There are payphones on both sides of the platform. Rare find now a days. :-)
To get a seat, try the last 2 cars or first 2 cars
Dirty and crowded. Did you expect something else?