The problem you face when thinking like this is that fear alone isn't actionable. Instead of doing something about your fear, the fear feeds on itself, and usually drains your motivation.
If you become caught up in fear-based thinking, you should try focusing that energy on a well-defined goal. If you do this, you automatically define a set of actions. If you're afraid of being poor, create a plan to increase your income. It might be going back to school, obtaining a higher paying job, or developing a profitable website. The key is moving from an indefinable desire to tangible, measurable steps.
If you focus your mind on positive goals instead of fear, you put your brain to work creating a plan for success.
You are no longer worrying about the future. Instead, you're beginning to do something about it