It is definitely harder if you have been divorced, the longer the divorce, the harder it will be. But on the other hand, you see couples making another go of it every day and succeeding. So this means that if you approach it right then you have a pretty decent chance. Here are some tips to answer the question "Do divorced couples get back together?"
How Long Has It Been - If it has been under 5 years since you have been divorced, you have a great chance of getting back together. The longer your relationship was also plays a part as they will still have lots of memories of you and think about you daily. As a general rule, if you have been split up for shorter than the time between when you met and divorced, then you can get back together.
How Do They Do It? - Obviously you have to approach the person in question or be in contact with them. Start off slow and ask them how they have been and offer a coffee shop meet up to catch up. This is as easy thing to say yes to and gradually you can make your way towards dating them again.
You need to become the person that they fell in love with so that they feel attracted towards you. Attraction is not a choice so the ball is totally in your court. Change your style to how you were when you met and mentally go back. Maybe you were more outgoing humorous and confident and you have to re access that state?