Ways to induce labour?

So I'm almost 39 weeks and have been told I may need to be induced or a c-section...I find out on Monday. I really don't want to as I have planned for a natural birth. And I've been told that I'm aloud to try and kick start it. What are some ways to help start labour? What's worked for you or what can I try out? I have an exercise ball? I'm going to try nipple stimulating as well. And I can't have sex as I'm a single mumma. Thank you! :)