Add the pasta to a microwave-safe bowl
Sprinkle a little water over the pasta
Cover the bowl loosely
Microwave in short intervals, stirring between each
Heat until warmed through
Add a little sauce, water, or oil if the pasta seems dry
Reheat in a skillet over low to medium heat with a splash of water or sauce
Stir occasionally until evenly hot
Reheat in a saucepan over low heat with sauce or water
Stir gently until warmed through
Check that the pasta is hot all the way through before serving