I’m a big believer in keeping knowledge fresh and up to date. Whether that’s a course, event, YouTube video or a good old fashioned book.
Some of the best content that has left lasting impressions on how I approach my work have been from free or near free content. Career wise I’ve found some certifications useful from a CV perspective but less useful from a content perspective.
If you haven’t heard of OKRs then you need to do a read up on them. They are a simple way to cascade the organisations goals across teams and individuals and then track the progress against those goals on a week to week basis.