I miss the struggle...almost

I think I found life more satisfying in college even though it was a much bigger struggle. I felt like I was getting something done, making a difference, and going somewhere. It's not that I don't feel that way now but I think it's different. It's just being in the real world I suppose. There aren't anymore compulsory milestones. In college I was working toward graduating and getting a fantastic job in 4 years. Now I have that, I achieved that. What is the milestone now? There's no 4 year mark to look forward to.