occur to (someone)
to come into someone's mind (an idea or thought)
It occurred to me that I will not be able to meet my friend on Saturday because I have to go to the airport to meet someone else.
How to Be Chill
When you have lots of self confidence and comfort with who you are, you will have a much easier time being chill. You will know that its okay if you make a mistake, that it doesnt make you worthless or something like that. You will know you can handle whatever crazy life manages to throw at you.