"Vision without action is merely a dream. Action without vision just passes the time. Vision with action can change your world." 
Your mind is your most powerful muscle. Use it to your advantage. Visualize what you want and take steps toward that goal. One piece at a time it all comes together and suddenly your vision becomes your reality. 
Training is worthless without your focus. Stop passing the time and wasting energy. The difference seems small but makes a huge difference. 


Try this during your next training session: change your thoughts from things like "it's so heavy, this is too hard, I can't do this, I'd rather be anywhere else, how many more reps do I have to do?, how much longer?" to things like "I am strong, I can do this, I will succeed, I want more, I can, I will" 
What do you have to lose? Say it in your head, no one will hear it but you. Just try it and see if it makes a difference. 
make sure to say it with confidence. and believe it.