If you want to up the performance of your small charcoal grill consider hacking it to use a chimney-shaped charcoal starter to hold the burning charcoal instead of the normal charcoal bed of the grill.
This mod will raise the temperatures, reduce cooking times, and by concentrating the heat it reduces the amount of charcoal you need when only grilling a couple of burgers or a single steak.
Instructables user dlewisa removed the legs from his Weber Smokey Joe grill, and cut a hole so he could fit his chimney charcoal starter. He welded the two together, but if you’re careful about cutting and grinding the hole for a precise fit you can skip that step so that your rocket grill can be disassembled for storage. Reattach the legs to the charcoal chimney for stability; you don’t want it tipping over when its over 400 degrees Fahrenheit.
Now all you need to do is load the chimney with charcoal (the author prefers natural wood chip charcoal), place a single piece of newspaper beneath the chimney, and light the paper.
In fifteen minutes the charcoal will be ready and you can put your grill grates in the grill and optionally preheat the grill by covering for a few minutes.