I was in a homeopathic store bathroom when I saw the following written on dry erase boards sitting in the bathtub, left over from a class and found it to be incredibly true. . .
"The only thing a child needs to know from their parent: that they are lovable, and capable."
"If you didn't recieve this as a child, then what you can tell yourself as an adult is, 'My parents did the best they could.' "
Pretty simple, pretty poignent.
I would add that as an adult you can tell yourself that you are lovable and capable and surround yourself with people who are supportive and loving.