The daily plan
Once I've done a weekly plan, I create a short document, one for each weekday. I then look at the weekly plan and assign the tasks for the week onto individual days. I also add in any meetings from my calendar, plus anything else that I know will interfere with the schedule.
Then, every evening, I have a reminder, set on my phone, to plan the next day. This basically means looking at today's document, then looking at tomorrow's and figuring out what I need to do tomorrow. I update tomorrow's document accordingly, so when I get to work I can (in theory at least) get started straight away.
Take action: A day goes by in the blink of an eye. Don't waste it.