Lots of different sounds can make you more productive while you work or study (particularly music you're not familiar with). However, it turns out video game soundtracks might be the best option of them all if you need to concentrate.
Why? As the duck meme (don't ask me why) above states, this music is designed to sit in the background and inspire you -- without interfering with your focus.
Brilliant tip courtesy of soccermom000 in the Advice Animals subreddit.