Metta meditation feels great and is very easy to get started on. Good at weeding out interpersonal traumas and emotional triggers. Can change your baseline disposition to be more pleasant, friendly and welcoming to other people.
This simple cheat sheet to Buddhist Philosophy will help you stay on your path and mindful of The Four Noble Truths, Buddha’s first sermon after he reached the stage of Nirvana. Not Buddhist but these are things to think about.