Yesterday you made a pendulum, and now here are some tips on using it. If you didn't have time to make one, you might want to save this message until you do. Pendulums are very personal divination tools, and they don't work the same way for everyone. You need to take the time to try yours out and learn how it reads.
Hold the chain or cord and let the weight hang freely. Wait for it to settle and be still, then think of a question that you can quickly verify or one you already know the answer too. Concentrate, and the pendulum should start to move. Take note of how it moves (clockwise, sideways, whatever) and that is the movement for the answer to your question.
You'll need to give it several trial runs in order to get the feel of the answers.
Once you think you've gotten the hang of your pendulum. Make a prediction about something you know is going to happen soon and see how accurate you are.