Stick to the instructor’s schedule as much as possible. Staying on schedule will help you have a feeling of normalcy and prevent you from falling far behind.
Find out how to ask questions. Is there a chat feature? A discussion forum?
Close distracting apps and tabs. Humans are not as good at multitasking as they think! (see "Avoiding Multitasking" page)
Continue to take notes as you would if you were there in person. Many studies show that note-taking builds the recall of material and helps to increase test scores.
Watch recordings at normal speed. Watching at faster speeds can decrease retention and result in lower test scores.

This resource is adapted from“Adjusting Your Study Habits During COVID-19.” Adjusting Your Study Habits During COVID-19, University of Michigan Academic Innovation, 2020, ai.umich.edu/wp-content/uploads/2020/03/student-disruption.pdf in accord with CC 4.0 copyright provisions.