What to burn when you run out of wood.

So I usually burn 24/7 from Dec thru March and go through about 2 cords to heat my 900sq ft house in Connecticut.

I ran out of wood this year and the going rate in my area is $300 plus for a cord!!! (It gets worse every year)!

My question is ....what have you burned in your stove besides wood?

I read another thread about charcoal, ive read about coffee grind logs, paper logs, etc...

I'm wondering if putting a few sternos in a nice clean stove would do anything? (My stove is cast iron). Any thoughts or ideas to help get me through???