How often do you BD during positive OPK?

Sarah
OPK test strips say today is the day.
How often does everyone BD in your fertile time frame? 
Just started testing yesterday and it gave me a darker positive today. 
We plan to BD today, of course, but is once a day enough? 
I just want the optimal opportunity. 🙊
Thanks for your opinions.. 
Praying for BFP this cycle. Baby dust to all!