Let’s say you’re planning to work on your roof next Spring. You call a supply company for roofing tiles and tell them you need some. They ask you when, and you demand to have them nine months before you plan to begin working.
Then, the day before you start, you inspect the tiles and find some things you don’t like about them. You call the company, asking them to fix the error and send you more tiles by tomorrow, because that’s when you’re starting, and you ordered these tiles nine months in advance just to avoid this problem.
Do you see the problem here?
You can ask for things whenever you want, assuming you and the other person can make an agreement. But time is precious, and when you’re asking for it from other people, use it well.
The Opportunity Machine 