Personally I have two planning tools that I use constantly. Next to me I keep a notepad with daily to-do lists. They usually span two A4 pages because I like to do some serious multi-tasking.
I also carry a Moleskine notebook with me literally everywhere I go. I spend a couple of hours a week writing ideas, goals, plans, and lists in it. What’s coming up next, how to increase income on a website, lists of actionables to launch a new project, the chapters for a book, points to write in an article. You name it, it’s in there, combined with enough squiggles and doodles to impress the most idle mind.