Slouchy Socks

Don't get me wrong. I'm not complaining. The SuperHero is happy with his socks -- wearing them as we speak. In fact, he took them off only to have a shower. But, I would like to get a better fit the next time. These seem a little slouchy, not very, but a little. Maybe blocking would help. I just don't want to make them bigger. So, to all of you experienced sock knitters out there, how can I maybe make these socks a bit tighter? Will or should blocking help? Thank you!!