Originally Posted by quads
No simple answer. Trial and error, excellent record keeping, a couple of years.
You have to find yourself.
A couple of years seems a bit steep....
BUT a decent sample size is needed, i would say around 10k for each type of ring ie 10k full ring NLHE, 10k 6max PLO, around 1000 tournaments of same structure ie 1000 $11 9max SNG etc.
If you really want to do it properly i would suggest getting PT or some othe tracking software to track results. Once you have done a large enough sample for all the games you find interesting simply go through and look at which game(s) you have the highest win rate at.