One way to greatly increase the chance that you will fail is to, when facing a task that needs to be done, tell yourself you'll do it later. You won't do it later. Probably.
If you have something to do, and you have the time, and you have the resources, but you tell yourself you'll do it later… chances are you won't.
Granted, timing is an issue. Sometimes, it's just not the right time to do certain things.
But, if the timing is good, and you have the necessary resources to do it, but you decide to put it off… You are in danger of just not doing it.
I have seen this happen literally over a thousand times. Given the opportunity to do something, far too many people say "I'll do it later" but never do.