I love that there is so much to do in the summer. From story times, to park days, library reading program events swimming lessons, family vacations, and day camps, there is SO much on the calendar. I have a regular calendar, but I like keeping a special one just for the summer. Each year I create an Excel spreadsheet where I can enter in everything that's going on in the area, plus the things we are already scheduled to do, and I can easily track what's going on and where we need to be. Yes, the summer is meant to be relaxing, but when you've got kids at home, it's always busy, and a plan makes my life (and thus all of our lives) sane.
I'm telling you, it works wonders!!! There are several ways you can do it. It's an Excel file, which means it's editable, which gives you options. You can print it as it is, and write everything in by hand, or you can type in all of your activities in the file itself, then print. I have a friend that prints hers as a large engineering print, and puts it up on her wall. GREAT idea!
Any way you do it, I hope it makes your summer a little bit smoother!