Question

Make a list of three things you have to do to get ready for the party using tener que + infinitive.

Answer 1

Well First of all Tener que means Must
so the list will be maybe like this If I understood the Question correctly 
Tener que tener pastel para la fiesta = must have cake for the party
Tener que haber adivinar para la fiesta con regalos= must have guess with gifts 
Tener que tener favores de partido = Must have party favors 
hopefully I understood the question correctly and I was a help to you 

Answer 2

Tener que bailar
Tener que comer
Tener que ir
Tener que banar
Tener que vistir