I am a huge hockey fan...Here is what I suggest:
A free train ride to and from the game.
Major sponsors giving away a free product -ie: DD's free Coffee Coolata ticket... Give-away Sprite Night.
$8 Tuesday's - every Tuesday for half the season.
Stick signing night by the players.
Or better yet...a free box for the up&coming top hockey players of the week in New England - for kids under 14. (ie: mites night, squirts night, pewee night...etc).