This is a great question! I'm actually teaching my Sunday school class about this very subject this weekend. What a coincidence!
I think we will spend a lot of time worshipping the Lord, being with Him, having our questions answered, and especially basking in His love. (If you think orgasm is great, you should feel the "thrill of the Spirit"!) But I think we will also have specific jobs, perfectly suited to our personalities. According to the Bible, we will have new, perfect, and
physical bodies, so there will probably be a physical world to explore and manage. These are just my ideas. The Bible only hints; it is not explicit.