In order to send works to a company, I made my portfolio in just a day. That means, one year of M.Des work compiled and composed in one day :D Despite several rechecks, I didn't notice the silly spelling mistake :( Unfortunately that blunder went to the company.
Not only this, I had uploaded this portfolio on SlideShare, which resulted in 125 views within the same day from around the world except India (my own country). The funny part was, portfolio was trending there, lol and to add more fun, two UX magazines (from Japan and America) who liked my work had also tweeted the link of my portfolio :p
Anyway, first professional portfolio, first blunder, first lesson. Up for it!