Identifying grammatical gender in French with 95% accuracy

Grammatical gender tends to be somewhat more difficult to identify in French than in languages such as Spanish and Bulgarian, but a page here I saw recommended the other day gives a list of 40 terminations that when identified can be used to correctly identify whether a word is masculine or feminine most of the time. As there are always exceptions to this, the most common exceptions are also indicated so that you don't have any rude surprises. Of the words that the author took a look at, the endings that identified gender correctly 100% of the time were -ron, -sme, and -ton for masculine, and -aison for feminine.