I am forever making "To Do" Lists. I typically start each day with one.
I'm also guilty of doing the things I find easiest first. That's not necessarily bad, I can get several of those checked off my list fairly quickly. However, if a task is something I'm dreading I may put it off.
Lunch gives me a natural break in my day (though not always a long one!). It's then that I re-evaluate my list. Have I done the things that must get done today? If not, I need to use the afternoon to focus on those tasks in order to have them completed by deadline.