One way to ensure that you’ll be able to persuade someone to help is by asking for more than you need in order to ensure that you’ll at least get half. If you need to borrow someone’s truck to help you move, ask if they can help you pack, unpack, and unload your belongings. This is a lot to ask of a person, so there’s a chance they’ll say no. If they do, then you could just ask to borrow their truck, the main reason you asked for help in the first place. They’ll be much more likely to say yes, because they feel bad about turning down your first request.