It is proper for every yirei shamayim to do teshuvah on Lag b’Omer because Reb Shimon’s merit will help him purify himself. ~ R’ Yohonoson Eibshitz zt’l
Today is also an opportune time to daven for good children (to be like R’ Shimon Bar Yochai), Parnassah (as today was the day the mon started falling), Healing, that the barren should bear children, Shidduchim, Ruchniyos and Moshiach.
Please also daven and say Tehillim for all those that were injured last night in Meron. May they have a Refuah Sheleima!