Step 1: Assemble your parts
Two empty aluminum cans and one full one. The type matters very little, although there are some bottom-brand beer cans that are simply too thin to make a good stove; this assumes a 12 oz can although obviously the 14 oz tall cans work since I'm using one.
A single edged razor blade
Some number of thumbtacks and a nail
A piece of flue tape (ideal) or heavy gauge aluminum foil
A ruler, book, and sharpie marker
Your life will be made easier by a hammer and a pair of scissors