My fat briefcase is in my other office. There are six briefcases near my feet as I write this - no, make that seven - but not one is the fat briefcase. I've searched them for an answer and they've not come up to snuff.
The fat briefcase knows. That's why it's fat. When we get clever, we put things in special files. When we get ultra-clever, we put them in fat files or in fat briefcases.
The secret is to keep them nearby.