I have often listened to the School of Life videos on YouTube, there are books and articles on the website. They are short chunks on a variety of subjects around mental health, relationships, trauma and 'life'!
I also tend to read thoughtful books which contain self help in a conversational sort of way - Matt Haig's books are interesting, also Oliver Burkeman, Four Thousand Weeks: Time and how to use it. Simon Parks, The Journey Home.
I also listen to All in the Mind on the BBC and there's a podcast on ABC, the Australian broadcaster with the same name. If you listen to podcasts, there are lots, people seem to like Ferne Cotton (not for me!).
Depends what you want really, is it lists of actions you can take (CBT-like) or work that is therapy based. I've just remembered Philippa Perry, the Book You Wish Your Parents Had Read and The Book You Want Everyone You Love to Read.
Happy reading!!