The biggest obstacle that I would find was tiredness. So I got a sheet of paper and I started writing down why I deserved that big meal or why I deserved watching TV or browsing the internet after work. On the back of that sheet I wrote what were all of the benefits that were going to come if I started working out. When I finished I realized that the reasons to not workout were a fewer than the benefits that would come if I started working out. This was one of my biggest motivation and I will keep being until I get the body that I want. Another big motivation for me was my grandfather who passed away because of his obesity problems, he was only 50 years old when he passed. Just thinking about the fact that I was making the same mistakes that my grandfather did, and I wasn't going to be able to see my grandchildren like he did, made me realize that I really needed to change and I needed to do it as soon as possible.
Anyway, now all that all the initial struggle is gone I can't wait to workout and the more I workout the more I feel better about myself. As you might have already understood the change is not only physical but it's psychological too. Your start feeling better about yourself, your self esteem goes up, you will start having more social skills and you insecurities will go away. There is no reason why you shouldn't do it, you've got nothing to lose after all. I can spend here hours and hours trying to motivate you but remember in this life you've got one thing and one thing only and that is self discipline. You are your biggest motivation, make yourself and your life the best show that people have ever seen. Find you motivation, set a goal and achieve it. That is all folks if you wanna start working out today here is a link that will teach you the basics. I will leave you with a video that I watch every day before hitting the gym.