I often need to have it really pounded into my head that I've got to just keep writing and write multiple projects, rather than pinning all my writing hopes on a single project/idea. This isn't new or unique writing advice, but it's important advice. Joseph and Jeffrey also do a great job presenting what can often feel like just a platitude (practice makes perfect!) or even condescending (so you want to write? then just write!) in a way that adds impactful insight.