I prefer to meditate using a repeated mantra or to read. When my brain has to focus on a word/phrase or the book, it’s harder for it to get distracted by other thoughts. If needed I will do either of them a loud for further reinforcing the same idea.
Th O F.
I just allow it to be busy by observing what it's busy about rather than clinging to every thought. Also try to focus on your breath going in and out of the body
It might sound weirs but I've made the experience that if your head is full of various thoughts it is best to write them down on a piece of paper or better in a notebook. This way you can let go of things but you still have them near you and in addition writing can be pretty calming.