What can i do with this great stuff that i have total access to constantly?

Freeze almost anything.

Or you can put it in a container, and when the nitrogen heats up, it becomes gaseous, so a lot of pressure will build up in the container, creating an explosion.

Also i need to know what a good container to put some in. I was thinking a thermos or something of that sort

lol
you can't keep N2 liquid unless you use a pressure container.
It will become a gas.
The great thing you should use N2 for is as an asphyxiant.
Look that up.

drop in a rose, then throw it on the ground and it will shatter like glass

also i declare shens that u have full access to nitrogen