I know that I don't stay thankful enough. Gratitude, it seems, is a lifestyle. It's not a one-time, check the checkbox and move on, kind of thing. The joy and peace that come from gratitude, that you see in the writings of people like Ann Voskamp, doesn't come from occasional thankfulness. If you can't muster up the discipline to thank God every moment, or even every hour, is it really so hard to find one time a day to stop for a minute and thank Him for as many things and people as you can think of?
How can you remind yourself to stop, just once a day, and express your gratitude? Is it really so hard? Is there a downside to it?
Give it a try.