Future sysadmin, what I need to know

I am currently a senior in college preparing to start looking for a full time job. I have for the past 3 years been working very hard to give myself a ton of experience as a sysadmin.

• I worked for 6 months as an intern sysadmin at a relatively large company (I go to a school with a coop program they are 6 month internships)
• I have been working for my schools computer repair shop managing our servers during most of my time, and repairing student machines when I get some free time
• I read this reddit blogs and documentation on software for fun.
• I recently started my own blog which I aim to document my setup of different software tools

What I want to know now, is, what else should I be doing? I think I want to work at a startup, or company with a similar vibe.

Thanks

[edit] I have a pretty strong developer background, but find systems more exciting