When I was younger I though microwaves were the tools of satan.now I realize I was the tool...
The proper use of microwaves includes a simple one question test:
Question 1) How many ingredients do you want to heat up at the same time?
A) One ingredient.
B) More than one ingredient.
If you answered (A), then you will find that the microwave is often the best tool to get that job done.
If you answered (B), then you will find that the microwave is often the worst tool to select.
Maybe a few examples will help. Suppose you want to heat corn. How many ingredients? One. Therefore microwaving will often be a great choice. Example 2: suppose you want to heat water, is microwaving a good choice? How many ingredients? One, therefore microwaving is often a good choice. Final example: suppose you want to cook a pineapple upside down cake. How many ingredients in it? More than one, thus you probably will be better off using a different heating mechanism.
There are a few exceptions (i.e. steak; but then one might argue that meat and fat are more than one ingredient), but in general it is a great rule-of-thumb. Use it and the microwave will be a tool and not you.
Note: the same test works when choosing name-brand foods vs. store brand foods. If it is one ingredient, usually the store brand is just as good. If not, usually get the real stuff.