There are many useful synonyms for the phrase "pay attention to". Some options for expressing focused attention include "focus on," "concentrate on," "heed," "mind," "observe," "notice," "take into account," "consider," "attend to," "watch for," "look out for," "keep an eye on," "be mindful of," "take note of," "take notice of," "be alert to," and "take cognizance of." Each of these phrases can convey a slightly different nuance or emphasis, so choosing the right synonym can help to accurately communicate your meaning and intent. By using these alternatives to "pay attention to," you can add variety and interest to your language while ensuring clear and effective communication.