Work within yourself. Get to know your True Self. Meditate. Put your intention out to the universe that you feel ready and are open to meeting your Twin Flame. Then just leave it alone. If it is meant to be, it will happen.
One way to prepare for your reunion is to work through personal issues that you are aware of. You are not just working on your issues for yourself, you are preparing yourself for your twin as well. If you have a lesson you need to learn, then go through the process and learn it. Do it so that you will not have to go through those specific lessons with them when you reunite. Life molds and shapes you constantly and it is always for a precise reason. When you are both in alignment with each other, the opportunity to come together will present itself.
Many people think that when they meet their twin flame, life will instantly become perfect. This is not necessarily the case. There are issues and you will be working through those issues together. You will stumble and find your way as one.