Do what you must now so you can have what you want later! Whether it's about having to go to school, studying, or taking final exams, you must do it now, in order to get your degree later. If you want to master your craft, you must put in the hours of pain, struggle, and sacrifice now. That temporary frustration will lead you to what you want to achieve later.
There's a short term game that must be played. It's a test of your will, passion, and discipline. If achieving everything you want was easy, it wouldn't feel as special when it finally manifests. The 1% success stories have mastered this equation.
When you choose to focus on what you WILL in the future ... the now becomes automatic!