Deal-breaker items could include: if the person has some form of alcohol or substance addiction or abuse, if they are married or in another relationship, if they are physically or verbally abusive, and even if they smoke.  For some people, smoking is not a big deal, but for me, I just can’t stand kissing someone after they’ve had a smoke, so I decided to include it in my deal-breaker list.  What are your deal- breakers? All you need is three.
I know the LOA says when you want to manifest a specific person you have to be willing to lose them – you have to let go and be ok with not being with them in order to manifest the relationship you want. It also says that you should visualize the relationship you want with this person as if you already have it. How can one do both? How can I imagine being in a relationship with this person but let them go and be ok with not the being with them at the same time?
Or, like most people who claim to have found the way to manifest things through the LOA, is it that you truly don't want big things, new things, nice cars, paid off mansions, kids' schools paid for, permanent paid vacations, etc. If you wanted them, you know you could manifest them, you are just not that interested in those things right now. That's the typical response.
When we don’t treat ourselves well, that is a sign of low self-esteem; it sends a message we are not ‘worthy’ of love and care. And guess what will be reflected back into your reality? Taking better care of yourself, and treating yourself with the respect and love you deserve, will help shore up beliefs that say ‘I am good enough.’ ‘I deserve someone who treats me well.’
Success rate of 0.1%? Where'd you get that statistic? But whatever the actual number, your question is an invalid one. The law of gravity works 100% of the time, except we can fly planes, right? Yes, I know that sounds silly, but it's really to show you how silly YOUR question is because "LoA" works even "negatively" (put in quotations because human perception is what labels things as positive or negative when really, the universe is 'neutral' and things don't happen as a way to punish us... that's just ridiculous, it's not personal).
Michael Losier is the best on the law of attraction issue. He teaches one exactly how to master the art of "believe". It is easy to tell people that the law of attraction works; however, the LOA works if one firmly believes in receiving something specific. Now what if one can not convince oneself to deeply believe? Michael has a whole chapter on how one can realistically think ones desire into reality.

In subjective reality there’s only one consciousness, and it’s yours. Consequently, there’s only one source of intentions in your universe — YOU. While you may observe lots of walking, talking bodies in your reality, they all exist inside your consciousness. You know this is how your dreams work, but you haven’t yet realized your waking reality is just another type of dream. It only seems solid because you believe (intend) it is.
2) The Second List: Deal Breakers. It’s now time get clear about what I call the ‘Deal Breakers’.  These are the ‘red lights’ that you want to watch out for when you start meeting people.  This is a smaller list where you identify at least three qualities that if this person were to exhibit, you would not engage in a relationship with them. In other words, the deal would be off.

It’s quite clear that success has nothing to do with our initial set of circumstances. Some of the most poor and disadvantaged people in the world have achieved the greatest successes of all time. Oprah Winfrey was born to a single mother on welfare and was physically and sexually abused as a child. J.K. Rowling was divorced, had a daughter, and was living on government assistance before publishing the first book in the Harry Potter series.