Taking it correctly means:
-taking it as instructed, within your usage window (for most combined pills it's 24h from the moment you're due to take it)
-knowing what can interact with the pill (vomiting, diarrhea, medications etc)
-the pills are not damaged in any way and are stored properly
-not extending your break weeks (if your pill allows for them)
I would recommend you to read through the whole pamphlet that you got with your prescription. They're also available online.
It's important to understand what you're taking, how it works and what can affect it.
And what to do in situations such when you miss a pill etc.