I'm personally partial to CBT. Burns' Feeling Great and Feeling Good are classics that have shown to be effective in research. Once you build familiarity with t

I'm personally partial to CBT. Burns' Feeling Great and Feeling Good are classics that have shown to be effective in research. Once you build familiarity with the concepts through those kinds of explanatory resources, individual exercises like those published by UW at https://depts.washington.edu/uwhatc/cbt-notebook/ https://depts.washington.edu/uwhatc/cbt-notebook/ can be done in a self-guided manner.