Retiring seems to be hard at first on many people I've known. But as was mentioned above, now's the perfect time to try something new. Sit down and ask yourself some things you've always wanted to try and then start seeing what's feasible for you. As was mentioned, maybe learning a new language, learn to play an instrument (or another one if you already play something), writing a book, or often times places like the YMCA or local community colleges have short term "classes" on various things, like photography, painting, cooking, dancing, physical activities (golf, tennis, volleyball, etc.). I'm sure there are things you've always wanted to try, now's your chance. Don't let retirement get you down!