For me, Google Calendar and Todoist are lifesavers. I won't lie, I used to forget deadlines anyhow. But with reminders and a little discipline, things actually improve. You don’t even need paid tools, just use what works for you. Sometimes I still write my daily goals on paper and that has been an old habits of mine.

I've gone through the gamet of project meanagement apps over the past few years and I've always come back to using AppleReminders for tasks and I currently testing out Craft for the note taking aspects of things.