If you want to enjoy life does that mean that you should have no boundaries, no limits to everything ? We always want the dessert and not the main course of each day.
"If everyone is having a good time then why can't I ?", you must be wondering. We fail to maintain discipline because we think we will never be able to enjoy our lives.
Great athletes, artists, painters, writers etc, see something that motivates and and calls to them from the other side of the tunnel.
Believe that you will be successful. Once you are instilled with a perpetual positive mindset control comes along without any effort.
Envision your future self and use that motivation as fuel to work towards the opening of the tunnel.