Ask for advince in these situations. Use(what) do you think ... should ...?

1 Teresa has invited me to a party at her parents' house.
2 hazel still hasn't given me back the money whe owes me.
3 I'm having f party, and i have to write a guest list.
4 Lisa isn't speaking to me because i said she was stupid.
5 Paulo doesn't know whether to go to university or travel round the world.
6 these shoes are fantastic but they're so expensive!