I have read in many places that it is good to be grateful. To be thankful. Here is one such article: What Does It Mean to Be Grateful? – Mindful. If that works for you, then I recommend it.
I find a simpler and just as effective approach is to acknowledge when something is good. Wake up feeling rested? Say “This is good”. Enjoy your cup of coffee or tea or even just being up? Acknowledge that “This is nice”. As you go through your day, make an effort to consciously acknowledge all the good things big and small in your life. You’ll find many. And if you can’t, that’s ok too. Work to appreciate the good things in the bad. Rainy, overcast day? Good for flowers. Monday? A new week to do something good. Etc. If you struggle to think of any, talk to a friend or some other council.
You have lots of good things in your life. As you appreciate them, you will better appreciate your life in general. And that too is good.