Need to/Have to/Should

My friends are coming for dinner and I don't know what to cook. What should I cook?

I want to take up a new hobby in my free time. What hobby should I take up?

I want to buy a pet. What pet should I buy?

I want to buy a new phone. What phone should I buy?

I want to buy a car but I do not have enough money. What should I do?

I want to learn to dance. What kind of dancing should I learn?

I forgot my best friend's birthday yesterday. What should I do?

I want to have a very romantic date with my girlfriend. Where should we go?

I want to go on holiday next month. Where should I go?

I want to improve my English. What should I do?