If there's one thing I've learned from running my own company, it's that you can only fail if you give up. If something doesn't work, try something else and eventually you'll succeed. My first invention, an inflatable dartboard, just didn't become as popular as I had hoped it would, for some reason. My next venture, waterproof tea bags, also mysteriously failed to capture any market share. So I changed my approach, and went to Office Depot and Wal-Mart and Target looking for an unserved market, and I noticed that highlighter pens came in every color except black, so I got right to work on designing one. I expect to have it ready for mass production soon and should have the whole black highlighter market to myself. If it doesn't sell well, I have an idea that's uniquely positioned to capitalize on our country's booming health craze: diet water. I guess what I'm trying to say is that the key to success is perseverance...