It's important to learn how to use your small bits of time. All those begin to count up. It's not the long amounts of time you have that are important. you should learn how to use your snatches of time when they are given to you.
You spend your time like you spend money. You can waste it or invest it.
Most people have never thought through how they're going to allocate their time. You need to make a decision in advance.
At most I'll spend three or four hours daily, sometimes less.
Time must be explicitly managed, like money.
Many people take no care of their money till they come nearly to the end of it, and others do just the same with their time.
Different constraints are decisive for different situations, but the most fundamental constraint is limited time.
The thing you have to understand is that there are only so many things you can do in a year. There are only so many days in a year. There is only so much time you can set aside for certain projects.
Time perception is very much about how you sequence your activities, how many activities you layer overtop of others, and the types of gaps, if any, you leave in between activities.
What do you want to get done? In what order of importance? Over what period of time? What is the time available? What is the best strategy for application of time to projects for the most effective results?