Some people are really great at keeping their promises.
Others...not so much.
This is the idea at the core of Seth Godin's Linchpin - that whatever else you do, if you are the person at your organization who delivers exactly what they promise, you will become invaluable.
Time, resources, energy, focus... lots of things get in our way.
But when you overcome those obstacles and become that impeccably reliable person, well...be prepared to have to start saying "no" a lot more often. Because everyone is going to want you on their team/project/leadership initiative/etc.
Here's the only secret to business success you'll ever need: it's not about luck or the best pitch or networking or anything else.
It's about making "e" and "f" one single, perfect circle.