As an ADHD Coach I'm often asked what I think the best time management tools are. I really love technology and love trying out different gadgets and online tools. However, I think one of the most important time management tools is an analog clock.
Digital clocks do a great job of telling what time it is. In addition to telling the time analog clocks help us see how much time has gone by and how much time is left. An analog clock helps make time somewhat of a concrete concept too.
My Time Management Tip: Put a simple analog clock in a place where you will be forced to see it and practice looking at through out the day.