Where to find administration, preferences, etc?
Many Ubuntu instructions start with "System > Preferences". On Ubuntu 10 there was a System menu in the upper left corner of the UI. On 11 there is no such menu. What to do?
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
Click on de power icon in the upper right corner of your screen, there you will find system preferences.
It is in the launcher, near the bottom "System Settings"
If it helps, there are several guides to Unity, this one is popular