Be goal orientated. Knowing what you want and why you are doing it makes everything easier. When you have a purpose in life, obstacles along the way are looked at as simply that, obstacles, not impenetrable barriers. A goal will give you some perspective.
Know that everybody experiences the same. Everybody suffers the same feelings of overwhelm. Anybody who has arrived where you want to be has faced and overcome the same problems. Know you can do the same. The path is more or less the same for everybody.
Experience. My own personal experience tells me that I have never faced a situation, no matter how daunting that I have not successfully dealt with and overcome. Many of those situations seemed impossible at the time. Don’t question your ability to succeed.
Face life one day at a time. Today’s problems are sufficient for today. Don’t worry about issues that do not yet exist. Most of the things we worry about in fact will never exist. Don’t create problems only deal with those faced directly in the moment.
Chunk tasks. Break tasks down into smaller manageable pieces and the goal will become much easier. Obviously be aware of the big picture and the big goal but focus on the job at hand. By breaking a task down and looking at it as ten smaller goals instead of one large impossible goal, it all becomes much easier to deal with.
These are my tips for overcoming fear and overwhelm, if you have any of your own, please feel free to add them, all constructive additions are welcome.