Rinse cooked pasta under HOT water to prevent stickiness. Rubbing a bit of oil inside of the cooking pot before adding water and pasta will prvent boil overs. If they float, pitch them. Egg whites won't run when poaching if you add a bit of vinegar to the water first. Extra large eggs used in recipes may cause cakes to fall when cooling.
Egg shells come off of hard cooked eggs more easily if briefly rinsed in cold water, first.
To get hard boiled eggs with centered yolks, stir them gently as they boil. If you've forgotten which eggs you've hard cooked and which are raw, give them a spin. Hard boiled eggs will spin quickly. Raw eggs will wobble and spin slowly. You can also save yourself the egg confusion by adding food coloring to the boiling water when making hard cooked eggs.