Brehaut, I don't mean to be disparaging or disrespectful when I say this, but I find that looking for outs is a general sign of someone who should be looking instead at learning another branch of magic.
Let me clarify this. Outs are obviously a valuable tool used to bring an effect to a successful conclusion. There is a fine line however between outs used to successfully conclude the effect, and outs used to salvage misses. The latter is a symptom of that classical stereotype, the magician performing mental effects.
A classic out I hear suggested is the invisible deck. But I don't really understand. If you give them a prediction card, and get them to go through a comparatively lengthy mental elimination process - why do you need an entire deck to reveal their prediction? Of course, you can always place the prediction card in your pocket, so that if it misses, they never know that it existed - but this weakens the effect so much! Part of the reason Invisible Deal Force is so powerful is because a card is given to them at the outset, and you are committed. This is one example of an out weakening an effect, in my opinion, rather than strengthening it (for an example of outs strengthening an effect to bring it to a successful close, see Seven in Bryn Reynold's The Safwan Papers).
If one if afraid of risks - the fact that Invisible Deal is not 100%, whereas in reality it is as close to 100% as such a routine could possibly allow (I've missed once in the past one and a half years performing it) - then I think you miss the point of the routine and the beauty of these rare mentalism effects which do exist, and should take up another form of magic instead. Especially with this extreme form of mentalism, fear can't be a factor because your mindset will be wrong. It is, in effect, a complex version of a beginning magician who focusses solely on technical skill - there is an impasse created by his misguided view on magic which will ultimately stop him from improving.
I perform both Invisible Deal and Invisible Deal Force regularly in my close up repertoire, and honestly speaking, on occasion it does miss. For Invisible deal force for example, I find that I hit anywhere between 90-95% of the time. 95% of the time I miss, they choose the King of Spades instead - which is close enough to be impressive. A small small percentage of the time, they choose something completely different (you can usually tell as soon as one part of the routine misses). In such an example, I honestly think you have to cop it. As I mentioned before, I've only ever missed once with Invisible Deal (the spectator spread the five cards out of order - ouch!) - and I was horrified. But honestly? It didn't mean much.
Consider: Why are we afraid to take a risk?
Because we're afraid of failure - failure makes us look bad, etc.
But does it really?
Failure is only an issue because we make it an issue - that is to say that failure is bad because we perceive failure to be bad. If we were to not consider failure a bad thing, but simply an outcome which is not favourable but not advantageous either, failure all of a sudden isn't such a big deal.
Consider the notion for example that failure provides a sense of realism to a performance. I have certainly experienced this - failure amplifies my performance because it allows mentalism to transcend trickery.
But again, this is only relevant if one is not a magician performing mental tricks.
When it comes to psychological forces, simply put, I do not believe in the use of outs for the sake of having a safety net. An out will only be of use if it augments the effect in some way (as opposed to being a method to salvage a miss from another effect and leading into a second effect which will bring about a successful conclusion).
A few quick points to respond to: 1) I agree Brown's invisible force has a very high success rate (I think Brown says about 90%--it sounds like you are doing even better). My search for outs is more for Anate or some of Brown's other forces. Anate is very direct, quick and hard hitting but it also has a smaller success rate. 2) Every book or DVD i have watched has said that the best way to improve is to practice and the best way to practice is to perfrom. I have done this with complete strangers and people I know---If I was afraid to fail, I would not being do this. I think it is fair to be as well prepared for all situations and certainly can benefit from hearing from others who have more knowledge than me. 3) I do take issue with your comment that by merely asking about outs, you believe that may indicate I should take up another branch of magic. I disagree--I want to be the best I can be and if an "out" helps--I'm all for it. I think you can make your point without being discouraging. If there are no outs or they hurt the performance, than fine I need to understand that too. However, I think it is a big jump to state that just asking the question means you should change to another type of magic. We all start somewhere and we all can improve---hopefully using this forum helps us learn from others