One of the hardest parts of being a writer is sticking to the deadlines. And, when they are stretched out before you, several months out, it is easy to ignore them.
"I'll get to that tomorrow...I have time."
Until tomorrow IS the deadline, and you still are no where near the Finish Line.
Procrastination is one of a writer's biggest foes. It is so easy to put things off, and so hard to focus on getting them done now. That is why I am struggling with three books to finish by the end of August...
That old saying "Never put off until tomorrow what you can do today" is really good advice. But you can't do everything in one day either. Make a list of everything you need to do and prioritize it to get the big stuff done first. And it is best to write this list down, as checking things off or crossing them out is a great incentive.
Mix in a few quick and easy tasks here and there so you don't get completely discouraged, but keep your eye on the Big Picture so you don't run short of time.
It is okay to focus on one project at a time, but it is equally okay to do something from several projects in a day, as long as they all get completed on time.
Give yourself a workday. "I will write/edit/promote/clean house/etc. from 9 AM to 5PM" (if it is your entire job...) or "I will write two hours a day." (if that is all you have available.) And limit distractions for that time-frame. But don't work straight through on one project for eight hours without a break, because you stop seeing what you are editing, or miss things in your proofreading, etc, if you don't get up and at least circle the living room now and then.
And one of the things of extreme importance is reward yourself for milestones. (Even if it is something as simple as watching a rerun of America's Next Top Model...or catching Pokemon.)
If you can't tell, I am codifying this for myself as much as you, Gentle Reader! ;)