Join a ski club that is a member of the Northeast Ski Council. Various mountains in NY & VT offer members discounts on various dates...usually about 1/2 price. Membership in the Albany Ski Club is about $10 a year, so it more than pays for itself.
I actually started looking into that. Theres one in my county that charges a $35 annual fee, which isnt bad at all. Problem is to gain membership it seems you have to attend 4 meetings, which only occur once a month.