What to include? Anything you think you can discuss as relevant experience, in any capacity, as long as it isn't too farfetched.
Remember, they dont give a damn what you did really. They are more interested in how you developed skills from it. Im currently applying for PhD's, and ive been doing A-level science tutoring online for 2 years. They couldnt care less about the fact I tutor science-they care that its developed my communication skills, to the point I can explain complex scientific ideas very simply to a range of people, on a range of topics-which is a huge plus for what i hope to go into.
So experiences to consider:
*done any volunteering for any significant period of time?
*Were you a member of any societies/groups/sports teams during your degree? Any roles on the committees of these groups?
*Elaborate on your "small teaching roles"-part of your degree or something you did outside of it?
*Done any weekend/part time work during your degree or during holidays? (you can even use something as simple as working in a shop/pub/restaurant to your effect if you really tried)