DO U DO pratyaabdhika SHRAADHA TO UR ANCESTORS YEARLY WITHOUT FAIL?

Every brahmin should do shraadha to his ancestors during amavasya,birth of every month,manvadhi,yugadhi,vaidridhi,ardhodayam,mahodayam,vyathipaadam,ashtaka,anvashtaka without fail.U can see these days in ur almanac.If u r unable to do these shraddhas which count to 96 every year, also called as shannavathi shradhhas u must atleast satisfy ur pitru devatas by doing thila tharpanam which may take only 5 min to do.ATLEAST DO THESE 96 THILA THARPANAMS REGULARLY EVERY YEAR TO GET D GRACE OF UR ANCESTORS.IF U DONT DO THEY HAVE D POWER 2 CURSE U WHICH LEADS 2 PITRU DOSHA!!!