ovulation testing

Michelle
Alright y'all. I'm starting to use ovulation test strips this month. I've read multiple things and some people suggested starting to use them the first day you are off your period. What do you guys do to make sure you catch your ovulation day perfectly?? Any charting or just any other helpful suggestions as I start this phase of ttc. This is about our 8th month of ttc and we are 3 months post a miscarriage.