I don't always think this is the best thing to do, but sometimes I just don't bother filling that out.
Only reason is because I haven't had any jobs beyond TAing/Grading. I feel like if I had some industry experience, I would fill it out. Other times I do put down my research experience ( like summer ones where I got a stipend).
Most of of the Universities I apply to ask for CV/Resume, so I just attach that.