The best simulation activities would be to work in cold calls for a fundraising effort for a non-profit, or work as a journalist. This involves calling lots of

The best simulation activities would be to work in cold calls for a fundraising effort for a non-profit, or work as a journalist. This involves calling lots of strangers or semi-strangers to ask them for money in the former, and emailing lots of people to request interviews (who may be hostile) for the latter. Both activities have a useful end, and would let someone assertively say no.