When you're not clear about what you want and you get something anyway, there's a good chance you're left holding onto something that you realise later that you don't really want.

When you're clear about what you want but are wrong about how long you'll feel the need for it, there's a good chance you're left holding onto something that you wanted in the moment you got it but don't really want once the dust has settled. 

But when you've taken the care to understand what you want and how long you'll feel the need for it, you increase the chances of picking up the thing that's right for you.

The higher the level of clarity in this, the better decisions that we make.