Another example is when you start off having a "bad day" then it seems like everything goes wrong that day. The day is no different from any other day, you are just focusing on the bad, resulting in an overall crummy day. Gratitude works the same way, however, your end result is an overall great day.
For the first bit of this challenge, it might be a bit of a stretch to think of a list of different things you are grateful for each day, but soon enough, it comes to you as quickly as you can write it down...and soon enough you will find yourself going through your day with many more moments of happiness and gratitude when you notice the little things, like relaxing with a good cup of coffee or how sweet your child can be, or how you appreciate something a coworker or friend or family member did. Your go-to "state" shifts from being one of constant annoyance or frustration over all the little things to that of thankfulness for all the little things.
This doesn't mean you will go through your day being out of touch with reality. You can still get annoyed with things worth being annoyed about or mad at someone who pisses you off. You will just get over it quicker, you won't dwell on it and your focus is more on the good things.
Keep a journal or note pad by your bed. Every morning (right when you wake) or every night (right when you go to bed), write down 5 things you are grateful for from that day.
Like I said earlier, when you are in the habit of making gratitude lists, you will soon stop and notice all these nice little things throughout the day.
With all that said, I do sometimes get into a funk. So doing this challenge will help me to make the most of this time that passes so quickly and fully enjoy and appreciate it.