Raising credit scores for young potential investors?

[Jamison Colston]

For those here. I have a friend with a credit score of about 580 or so. Can't remember the exact number but she is wondering about ways she can raise it up quickly. I've never had a credit score below high 600's or so so I'm s little lost on how to help. I'm young and she is about the same age(23/24). I recommended a credit card that she can keep up with to gradually improve over the next few months but idk. I don't see any other way. I suppose it's a good time to maybe just suggest what ways any of us young folk can use to our advantage. Thanks!