How to Deal With Unfinished Tasks?

I tend to rush into the next task which demands attention. As a result, i have a couple of unfinished tasks which keep staring at me. I'm trying to consciously put a limit on the number of active projects you have. Being aware of how much yo going on and choosing to limit it. A good task management system is really helpful if youre thinking about what all do i have to do? And increasing your awareness of when you're starting something and leaving something unfinished.