I have been having a wonderful time vacationing and relaxing, both very important to mental health and creativity. Trying to be creative while stressed out can be an source of frustration, rather than a joy. The sense of the little fingers of imaginative thought shrinking into your brain, instead of flowing outward, only adds to the stress. A little down time may be just the thing to get those creative juices running.
In my case, I've thoroughly enjoyed spending time with my family and friends. I can't say that I gained any new perspective on my first novel, though. To that end, I found a lovely quote by Anthony Doerr, who said "I found my first novel difficult. I don't want to make it sound like it's any more difficult than driving a cab or going to any other job, but there are so many opportunities for self-doubt, that you just kind of need to soldier on."
Thinking too much can put a halt on the creative process. Get too far into the analytical side of your brain, and nothing is good enough anymore. In those cases, it's probably best to go with the Nike logo and "Just Do It" and soldier on, knowing you're in good company.