If you don't keep a journal on your computer or in a notebook (etc), now would be a great time to start. I find that writing in a journal is very cathartic and means I have to spend less time bogging down other people with my problems. (I hope you don't consider this blog to be an example of that).
You can rant about one topic and repeat yourself for an hour and no one will be annoyed with you. Plus, it's easy and free entertainment. I am sure, also, that occasionally you stretch your writing muscles while keeping a journal. Most of the things I write really are not fit for print, but every now and then I will see a beautiful phrase that seems like it's worth sharing.
Journals are not only helpful emotionally and creatively; they also are a great outlet for energy of all kinds. I like to write prayers to the Universe, and, usually, I wind up writing some sort of answer. Now, I am not going to get into any metaphysical questions here, but even if I am generating the answers, it's an answer nonetheless. It's another way of working things out.
My friend is a runner. She says she started running because she had nothing left. I could say something similar about my journal. But even if your life is going well, journaling is a great way to spend time.