"He, who every morning plans the transactions of the day, and follows that plan carries a thread that will guide him through a labyrinth of the most busy life"
~ Victor Hugo
The quote above captures beautifully the importance of writing a list of your things to do. Of all the time managing tips, this is the best and the only one you really need to use. I came across the idea of writing down the tasks for the day in Frank Tibolts A Touch of Greatness and have use it ever since with great success.
You do not need to pay thousands of dollars to attend seminars or throw your money away getting expensive software to help you in getting things done. Just paper and pen to list down all that needs to be done and the self discipline to do it.