You can read all the self help books you want;attend hundreds of self improvement courses, read self help blogs everyday and repeat self suggestions and motivations every hour of the day but nothing will change if you don't act.
Look at the world around you and notice that everything obeys the law of cause and effect. The screen you are reading this from just didn't happen. Someone thought of it, another built it. Just thinking about it did not make it happen. The thought was just the seed.
The seed had to be planted and nurtured and only after it had grown into a tree and starts to fruit can we harvest it. The same goes for the all the knowledge you have gained.
You must take action on it to see the benefits of it.