So, no surprise Lauren Weber publishes an article in The Wall Street Journal on whether gimmicks are effective. Overall, the answer is "no." While employers and prospects might be amused by the gesture, they are too focused on the business at hand to be persuaded to allow the clever to move onto the next step in the process. Here is that coverage (sub. req.)
A better bet for investing your energy is to pay attention to leveraging your cover letter to differentiate you from the triple-digit number of applicants for each job. But first, you have to ensure you are not knocked out of the box by the automatic filtering system which hunts for the necessary keywords in the cover letter. If the help wanted indicates that WordPress, PhotoShop, Japanese fluency and international experiences are requirements, the cover letter must mention explicitly that you have them.
Once that's done, then right from the get-go you present your edge. That should be in the first paragraph. For example, you note you first prize in a contest for banner ads for a Japanese sake producer. Indicate that you are including the link to coverage of that. And/or, you might say you are a native speaker of Japanese and have taught English as a Second Language to Japanese businesspeople. The more edge items to present, the better.
Here is an anecdote. Last year there was a help wanted for a public relations writer to research and create press releases. This was a plum opportunity because it was totally telecommuting. At the time I didn't recognize the importance of showing (not telling) how I was the best fit for the assignment. There was no response. This year the same ad appeared. I made it my business to demonstrate how I had gotten in the past and could in the present generate the results they needed. I start tomorrow, with two of their clients.