Many Universities have free online courses if you wanted to look up. Google audit courses for free. ie https://www.harvard.edu/about-harvard/frequently-asked-questions/faq-free-courses
Get a pet and if you are on borrowed time adopt an older pet that needs you.
Go onto youtube and seek out free audio books, Ted Talks or motivational clips.
Seek out support groups or volunteer opportunities. Paint, write a book, start a blog.
Try a new food or recipe each week. Start a daily to do list.
Look for new friends who are also going through similar life changes. Get a library card.
Enter online contests. http://www.contestgirl.com/ I have won 11 trips, new appliances, tv’s gift cards…it is gambling for free-the cost is your time.