I am trying to push myself to think positively, everyday I say to myself, this work is awesome, I am going to build things, doing things I like, coding and ship

I am trying to push myself to think positively, everyday I say to myself, this work is awesome, I am going to build things, doing things I like, coding and shipping features, but the time I open next ticket/IDE all these feelings are gone, how can you positively think when you are sitting on a shit