Get a good education first. Be extremely flexible in your day and expect things to happen. Don't get involved with the drama and smile when you talk. People can hear a smile even over the phone. Ask for what you need but be prepared and patient in the case where you don't get what you asked for. It is the government after all.

Saying no when I should have said yes it was when I first began working there. Always take responsibility for your own actions and make it a learning experience. Then how to do better!