you've got it right now.. no mixing, nothing to buy.

Urine.

I use chicken or horse manure. I also have used alfalfa meal. Its good at getting things hot. Just put a few cups on it and turn it over a few times. Really anthing that has nitrogen works well. Blood meal, is another one.

The hottest temperature reached in my Earth Machine composter was 165 Fahrenheit, and that happened a few days after I dumped in a batch of fresh English Ivy that I had just pulled and ground up.

Rabbit pellets soaked in water works for me.

Another vote for alfalfa pellets - rabbit food. Cheap and effective. Another good one is a cheapo box of blood meal - about $2 at Walmart but hard to find this time of year.

Beer is another option as is molasses and canned soda.

Dave

If you're looking for free stuff, I'd start with UCG and various animal manures. If you're ambitious, urine can help, as long as you don't already have too much moisture.

If you want to buy something, if you have a dollar store and they have bags of cat or dog food, those can provide a quick boost. The cat food usually provides more bang for the buck since it has a higher protein content. A potential drawback to the cat food is that it may have a higher salt content.

The coffee grounds, N of about 1.7, alfalfa meal, blood meal, N of about 7, or anything with a C:N ratio below 30:1 would be a catalyst and get your compost cooking.

How about liquid gold, aka human urine?

It's free and it gets the heap cooking in no time.

My kids never finish more than half a glass of soda but always fill very large glass and now I add that to my compost bucket rather than putting it down the drain.At the end of a year it amounts to quite a bit.

Any one have access to a truck stop? Ever heard of trucker bombs? hehe.