I used to have precisely the opposite problem; I would not consider any task pressing enough to prioritize it accordingly and my delivery would suffer quite badly.
100 Day System
I devised the following method to become more productive and I recommend to everyone; it uses a standard notebook (Moleskin, Leuchturm, etc) and divides the day into two components
- Productive Output
- Creative Output
You can find the methodology in this SlideShare << LINK which gives you more than enough to get started. Disclaimer : Ignore the front page; it was a marketing hook for viewers because I originally planned to turn the methodology into a fully published book.
Reception
The system of time management was praised by GeekDad, 43 Things and a few other productivity outlets. It was also elevated to the front page of SlideShare and rated as one of their Top 10 Presentations of the year. (They sent me a little email and stuff haha)