The Journey to getting your ex back depends heavily on the current position you happen to be in. Take for example that you are a particular company offering stocks to your shareholder. In order to attract large amounts of investments from your shareholders, you must increase the value of your company. This concept can be applied to your relationship with your ex as well. The position you are in after the breakup probably shifted downwards compare to where you were before, and your ex has now taken the investment somewhere else.
How do you increase your shareholder's (your ex's) value?
This is simple to understand but hard to implement. First you need to increase your "self worth" in the market. Getting your ex back means you are going to have to enter into some major competitions. Right now your stock is going down along with the value of your company which is yourself. This is definitely not the moment to panic and plead for others to invest in you or beg your ex to come back.
In fact acting worthless is only going to damage the values others have for you including your ex. This is the time where you need to find all the things your ex love about you in order to outweigh the negative factors impacting your relationship.
Establishing Long Term and Short Term Goals
Rebuilding is the key to winning your ex back for good. Determine what your short term goals are that you can achieve within a week or two and complete it step by step. The time that it takes for you to accomplish each of these goal are far less important than the quality of your work. How much effort you put into something is going to surpass how long it takes even in a short term sense.
Long term goals are goals that you will need to continue to achieve even after your ex will return. A relationship is unstable just like the stock market. You need to increase the value of your company (yourself) both short term and long term before you can get your ex back.