Playing on your own and for an audience no matter the size or even recording is a completely different thing than playing on your own. The clue is to just master the piece so well that no matter how nervous your are, you are able to perform the piece to the best of your ability.But what do YOU do if you make sure you feel safe with a piece to avoid especially memory slip during a performance?I have absolutely no idea on my own. I had so many memory slips as a child that I stopped performing in public.
Do you think you are the first person to ever have this problem?
Among most certified (Accredited) University Music Schools, the standard practice is to have those formally enrolled as Piano Performance matriculates to participate in a once monthly performance.
Afterwards, there are many College based Musical Clubs, that will allow a recommended student to "try out" their piece.
Then, there is the always common step of performing the piece "on the road" in a location different than the location of the pianist.