Regular exercise is an effective way to improve your overall health.

His suggestion was, effectively, an order.

How can I do this task most effectively?

The effectiveness of this new treatment is still being studied.

The medication had a positive effect on her health.

The new policy will come into effect next month.

He made a statement to that effect.

He made a statement to the effect that he would not be attending the meeting.

These drugs can sometimes effect miraculous cures.

The movie was filled with amazing sound effects.

The testing effect refers to the phenomenon where actively retrieving information from memory during learning enhances long-term retention.