If you aren't already familiar with it, Evernote, at its simplest, is a note-taking system. You can access it on the web, on your mobile device, or on their software. I use all three platforms, thank you very much. It's makes menu planning very simple for me. Your notes can be text, pictures, or sound. Check out this vlog [video blog] for the Evernote basics.
I use three notes constantly: menu database, this week's menu, and next week's menu. These are the titles of my notes--you can call your notes anything you like.
In my menu database note, I keep a living list of all the recipes I like and can make well. Whenever I'm stumped about what to make, I refer to this list. As I experiment with new recipes and find ones I like, I add to the list. I keep the hyperlinks of the websites where I find the recipes for future reference.
If I'm standing in line somewhere or if some culinary inspiration hits at a random time of day, I go to the next week's menu note on my phone and add my idea. This also serves as my shopping list towards the end of the week.
Evernote allows the use of tags. All three of these notes are tagged menu. I also have menus for specific holidays, like Christmas. Cooking on Christmas day requires a different level of organization, so I break down the menu into chunks of time. This way, everything is ready at the same time. I know when in the morning to start each of the recipes.
The Evernote clipper is an excellent tool for organizing recipes and it deserves its own post--coming soon.