If you don't quite get the logic of the title Failing for Success you are either extremely successful and never fail, or you are failing to learn. You should embrace your errors, own up them, and learn from them. Nobody does everything right, at least not the first time, so go ahead and fail, just make sure you do it in the name of future success!
Now the truth of the matter is that failing is learning, and learning leads to improvement if you let it. As you begin marketing your book, keep notes about what works, what approach gets you good contacts, what websites can help, which can't, and who can do you a favor (like a review). Don't feel bad about things that don't work, you'll know better the next time. And, make plans for your success.
Anyone can say "Gee, I want to sell 100 books this month," because that's probably an achievable goal, but it's just a desire, a wish, until you tie it to an action. Unfortunately that means you have to actually do something to achieve the goal you set, so make your wish and then set your goal.
A Wish: sell 100 copies of your new book in one month.
A Goal: contact two bookstores in your area and one media outlet (newspaper, magazine, TV, radio) every single day until you have sold 100 copies.
Does that goal seem managable? Sure, it's work, but you can do it. It's just four phone calls, 10 minutes of your day, for a month, maybe less. Of course once you reach your goal you'll want to set an even better goal!
If you are selling only Ebooks, preferably on Kindle where you can take advantage of the KDP benefits, set a different kind of goal.
Same Wish: sell 100 copies of your Ebook in one month.
New Goal: contact two book review blogs everyday begging for a review of your book, find one cheap (free is always good) advertising program beyond book review blogs each day until you have sold 100 copies.Now that you've got the idea, go give it a try. Make a wish, set a goal, and keep going until you get there. You can do it!