One thing I used to do, for several years, was read part of one of a set of philosophical books at bedtime, the way some people read from their religious books, just a little bit of reminding me how to live well before I went to sleep. The three books are It's Easier Than You Think: The Buddhist Way to Happiness by Sylvia Boorstein, The Miracle of Mindfulness by Thich Nhat Hanh, and Meditations by Marcus Aurelius. Zen Buddhism and Stoic Philosophy readings on a regular basis somehow helped me feel calmer and more centered.
Then, for some unknown reason, I stopped reading them. Either I let the books be packed and so didn't have them at hand after I moved to Oregon, or I just got out of the habit, but somehow I stopped. And I think that stopping that bedtime habit left a little hole in my calmness and my center.
When I remember to think about being mindful, or when I remember something I read and try to apply it to whatever I'm going through, I feel a little better. But because I don't read these books regularly anymore, I don't remember to apply them to my life very often.
For example, the Buddha taught that struggling causes suffering. If you struggle against something that you cannot change, you will feel added pain — the pain of suffering. If you struggle against something you can change but you don't try to change it or accept it, you will suffer. I spent the better part of two years struggling against the fact that my mother died and that she died at a time when she was finally free to do things that she wanted to do. Telling myself it wasn't fair is struggling. Not accepting the fact that she was dead is struggling. It is partly grief, too, but I think I made it worse by clinging to these struggles and clinging to my grief. When I began to read the Boorstein book again this summer, I was reminded not to cling. I was reminded not to struggle against what I cannot change. Those struggles have nearly disappeared now, partly from time and cognitive therapy and partly from reading one of my books and being reminded.