FOCUS and CONSISTENCY

I have always have a problem of FOCUS in everything i do. There is a a lot of distraction i find that makes it difficult for me to focus on anything. Whether i want to learn somthing , build a business or create or stop some habit. I think the focus in life in general is very important. I am unable to achieve success in any thing because i cant able to complete that because i cant focus on it. For example, if i started a learning something after sometime i found out that some other thing is more in demand and has more money in it, i will get distracted and stop that thing. I need consistency and if you are consistant in anything you do for a long period of time , i think you have 99% chance that you will be successful in life. What you guys think, share your opinions on it. Thanks