Urban Dictionary
iiwii - pronounced 'ee'-'wee': It Is What It Is. 

There is a difference between awareness and anxiety. In life, we have to prepare but we do not have to fret. Anxious people will tell you all the things that might go wrong and no amount of persuading will get rid of the stress they build up in themselves.

The key is not to get upset in advance. Do the opposite: know that whatever is going to happen you will get through it. Don't you find that so pre-liberating?!

The answer lies simply in the idea of presence. As Seneca writes:

“It is likely that some troubles will befall us; but it is not a present fact. How often has the unexpected happened! How often has the expected never come to pass! ...what does it avail to run out to meet your suffering? You will suffer soon enough, when it arrives.”

It may rain tomorrow, but that doesn’t mean you have to get wet today. You can enjoy today's sunshine while still putting your umbrella by the door just in case.

The point is that the future is mostly out of our control. Even the "best laid plans" go awry at times.

When I lived in NYC, I was part of a hiking group called Wild Earth Adventures. Passed away now, the leader-Charlie Cook-was an inspiration and a joy. He taught us more than how to hike and find a good place to put up a tent and the proper way to dig a hole... his positive attitude about the whole of life was a subtext to his teaching. For example, he challenged us to stop saying things like "it looks like bad weather" ("how can weather be bad?") or "the rain will ruin the hike" ("only if you will melt").

Charlie Cook lived iiwii (It Is What It Is) philosophy by not allowing what can't be changed to change him.

How often do we find ourselves using words like "inconvenient,""unfortunate," “unfair,” “unlucky,” “frustrating,” or “annoying.”