Future

Every time that I think about the future I'm afraid . How will be my life be the next years, months , seconds ect ??
At the moment there are different projects in my mind : about the job that I would like to do , the place where I would like to live and many others .
But the question is : will I be able to achieve those targets (or more commonly used: goals) ?
This sense of insecurity sometimes drive makes me sad . I know that a good philosophy to live should be live the life day by day , enjoying each moments as well as do not be stressing about the future .
Honestly , even that way of thinking could be good , I can't live like that .
I'm always think about what will happen next; when I achieve something most of the times I don't take a break but I focus my concentration on the next target .
A sample of that is at the University . A couple of days ago I've passed with a good grade mark an important exam of Financial Trade . The day after I had a good party with all of my class mates , but in my mind I was already concentrated (or focused) to the next exam .

In other words , I think that this way of living could be stressesing and in some occasions awful . However, all of this could help to not lose control and be distracted from your targets (goals)