There are 613 (Taryag) Mitzvos, 248 Mitzvos Aseh and 365 Lo Saaseh. But how many of them apply today? Some are only in the Bais HaMikdash, others are tumah and tahara, some are incumbent on Bais Din which we don't have because there is no Semicha. The Chofetz Chaim says that since each mitzva is so precious and we certainly want to do all that is possible he wrote a called Sefer Mitzvos HaKatzer. In it he lists all the mitzvos that apply today. Surely he says we want to know them well so the opportunity to perform them doesn't slip away. In it he lists 77 Mitzvos Aseh and 194 Mitzvos Lo Sa'aseh. To See the 77 Mitzvos Aseh click here to go to Revach Lists.