This verse is saying that whatever we may face or experience in a day, we are to give thanks.
Thanks giving in our heart should be offered to God no matter what we are going through. A few years ago while away on business, I had to change hotels because of a mistake in the scheduling. At the end of a busy day, this was not what I was looking to do. I gave thanks to God for what He had already done for me that day. By having the right attitude, which is an attitude of thanks, I was able to find and go to a better hotel. I choose to give thanks to God, because he always provide for me. It is not always easy, but it is a decision. You decide that you will have a right attitude in time of trouble and watch God turn you situation around.
I want to remind you that He will do it for you, when you have the right attitude!