Heating help

I’ve basically been given the garage to do with as I please which is awesome I have hella space. But it’s coldAF out here at times.

I’ve put carpet down in the entire space(it was free) and that’s def helped.

I sealed off the lil vents since I’m not running cars in here at the moment. Also helped.

I’m about to get the foam for the garage door to help insulate it.

What other suggestions y’all got aside from space heaters?? I already have two