Using omrom BP reader and this morning I'm getting 124/87. How can I lower this BP reading? How often per day to check for an average BP reading?

Automated. All automated machines need to be calibrated. To know what the pressure on your machine means you need to compare it to a mercury manometer. If it is indeed accurate then you can use the readings. Low salt diet such as dash diet and daily aerobic exercise along with avoiding smoking are good steps for all.