I wish there was a magic pill, potion, tip, exercise that I could give you and would help you be inspired. Unfortunately, there isn't. If you want to do something and be inspired, you need to actually do the work.
If you want great inspiration for a book, you need to start writing. If you want to be an inspirational leader, you need to have people to lead, and it goes on and on. The tips that I post every week help, but for them to work you need to have been doing the work. It's only when your mind has been filled with ideas, problems and options that the tips will actually work.
In order to reach writer's block and need to take a walk to clear your head, you need to start writing. You need to practice everyday (ideally) or at least some times a week. The same is true for design, management, marketing, blogging, you name it.
I personally had been procrastinating starting this blog for more than six months. I had all the usual excuses, not enough ideas, not a lot of inspiration every day, didn't have someone to edit my posts, not enough time etc… And then one day it happened, I took the plunge and started writing. What I find now is that the more I write, the more inspiration I have for another post. I can sit down and plan an entire month in less that half an hour.
If you want to be inspired and inspire people around you then start doing the work. Start every day with that thought and with doing the work that you love. You might have problems at first and be lost, but sooner or later ideas will start to appear and with enough practice you will be able to produce amazing stuff. No more excuses, do the work.