you need to find a book on testing, do some research and then come up with an idea for order. if you want us to comment on your research and what you think is the best order....we'll give you feedback but we're not going to do your job for you.
Reserve a few months every so often and preview retirement throughout your career. You won't regret that a 35 year career was reduced to 34 years to take vacations measured in months in order to remember what a stress and care-free life is all about.
Books and hard work will get you anywhere you want to go.