Best way to heat a small room?

[Stan]

I used 1 of these 2 years ago during the winter months.

Sunbeam Ceramic Heater: Heating, Cooling, & Air Quality : Walmart.com

I had it hooked up to a timer it would go on when the grow lights turned off. It kept the grow area warm at the same temp as when the lights were on. If I hadn't used it my plants would've died from the drastic temp drop.