I don't always remember where I heard or read them but here are some of the things I wrote down so that they would stick...
The past has served its purpose.
Self care is not optional.
You may not realise how wiped out you are.
When you are feeling overwhelmed you are trying too hard. Thich Nhat Hanh
Housework - a daily practice that promotes wellbeing.
And my current favourite (it makes me laugh)
To be calm becomes a kind of revolutionary act. Matt Haig in Reasons To Stay Alive