Looking on the internet deeply has found these results:

prepare for everything is the most popular phrase on the web.

prepare everything 1403,000 results on the web	prepare for everything 1665,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Yes, Mr. President I'll prepare everything ~ I'll prepare everything, we'll run with it within a few days. At 8:00, we come, we prepare everything. Usually, he lets me prepare everything my own way. Don't worry I'll prepare everything I promise you. We will prepare everything for tonight, sir. Did you prepare everything the way I asked? The task of the European Council will be to give a signal about this and to prepare everything to reach a political agreement at the latest, we hope, by next December.	But you can't prepare for everything. Now try as you might to prepare for everything, there will always be that unknown element.

prepare everything

1403,000 results on the web

prepare for everything

1665,000 results on the web

More popular!

Yes, Mr. President I'll prepare everything
~ I'll prepare everything, we'll run with it within a few days.
At 8:00, we come, we prepare everything.
Usually, he lets me prepare everything my own way.
Don't worry I'll prepare everything I promise you.
We will prepare everything for tonight, sir.
Did you prepare everything the way I asked?
The task of the European Council will be to give a signal about this and to prepare everything to reach a political agreement at the latest, we hope, by next December.

But you can't prepare for everything.
Now try as you might to prepare for everything, there will always be that unknown element.