The invasion of privacy often felt by urine drug testing has often been criticized. There are now a new type of saliva swab style tests that can perform similar tests, without the awkward observation process.
The guy who invented the first machine that pre-sliced bread in 1928, Otto Rohwedder, had a degree in optometry and worked in the jewelry industry. How did he come up with a machine that would revolutionize the baking industry when he wasn't even involved with it? Simple. He was presented with a series of dots and he simply drew the lines to connect them. The good news is that you can do this, too.