If you still want it, prove it with your actions. It's not your declarations, but your choices that show your priorities.

I claimed that I wanted to write something serious, but I kept putting it off because I decided to focus on something else, because I didn't feel creative, because I claimed that I would come up with a better idea tomorrow, because the conditions weren't right. But did I really care about it then? If so, why was I constantly looking for new excuses... See more

But this can't just be another autumn resolution written in your journal, which you'll abandon anyway because you realize it will require months or years of working on it.