Life is good!!!!!!!!!!!!

How many times do we think about our life during the day. Life is good every day, every hour and every second. We have to remember that about it. If you knew now that today was is your last day you would will value every second. So, why we spend your days in for depression or sadness or bad mood. Sun(sunshine?) is the same for everybody. It is so easy to smile or say something thamething good to a friend or help anybody. Life is good for everybody!!!! And we have to do it better.

In this sentence: I you know that today is your last day you will value every second.

Your present tense was correct but when we speak of "what ifs" the will changes to would and then so does the rest. Does that make sense?

I think your English is really good so I decided to correct it that way. :)