「made by」「made from」「made of」「made with」の違いは何?

People seem to be confused about these phrases. Here's my advice.

• made of - use this when the material hasn't been processed heavily
  
• made from - use this when the material has been processed a lot
  
• made with - use this when there are multiple ingredients or constituent parts
• made by - use this to describe the method

× This curry was made of beans.
○ This curry was made with beans. <- there are a lot of ingredients in it!

× I made it from frying onions and ginger and then adding a masala paste that I bought at an import grocery store. <- onions are a processed ingredient, BUT...
○ I made it by frying onions and ginger and then adding a masala paste that I bought at an import grocery store. <- this is talking about the method

× The masala paste was made by spices, peppers, and garlic.
○ The masala paste was made from spices, peppers, and garlic. <- the ingredients in the paste have been processed a lot