What is the best investment for a recent college graduate?

First and foremost, thank you for taking the time to help me out.

I will be graduating college this Spring and like most students—I have a ton of student loans that I need to pay back. I am looking a high yielding investment that doesn’t require a large investment. I am looking to make an initial investment between $500 and $1000.

I am open to all suggestions.

Thanks! :)