Focus Trumps Time
A short but intense focus leads to a better and quicker outcome than long but mild focus.
It's common sense, but I had a deeper understanding and appreciation when I delibrately reflect on it and experience it. Friends in my circle who are smart and quick to get things done are also the most focused people I know. They may not necessarily know a concept or a new technology, but they learn quickly with their intense focus.
Cultivate intense focus because it allows you to get more things done in a shorter time. You'll do more and have a fuller life. You don't need to live a long life, you just need to live a focused life.
I was prompted to write this short piece when reading an excellent write-up on procrastination by Paul Graham here. Read it!