Raise credit score what can I do?

Hey, I have a credit score in the 600’s. I had something in collections that I just paid off to get it deleted from my credit report. I only have two credit cards one for $300 credit line and the other $900 with capital one that I pay monthly. The other thing on my credit report, it’s my student loans for 26K.

What can I do to increase my credit score? I appreciate any advice. I graduated college last year and I’m not releasing everything revolves around credit