I will be studying at nine tomorrow evening. (use the future continuous to express what will be happening at a specific moment in the future.)

I am going to go home after this lesson. (It's a plan)

Do you think you will get married before you're 30? (prediction)

Oh no! I've broken the vase. I will say that Nemo broke it. (Use the future with "will" when reacting to something that happens at that moment)

Unless he arrives soon, we will not go to the party. (Use the future with "will" in first conditional sentences)

John hasn't eaten. - Don't worry I will make him a sandwich. (Use the future with '"will" to react to a present situation.)

I am meeting my friends at the cinema after work tomorrow. (fixed plan)

Can I borrow 90 dollars? I will pay you back tomorrow. (They just decided this plan)

Peter knows that he is going to fly to Chicago next week. (future plans)

I am flying to London tomorrow night. (fixed plan)

I haven't made any plans for Easter. I will probably stay at home. (They're not sure what they will do)

I am going to be rich when I am older. (prediction that we're not sure about)

We'll go out for dinner when he gets in. (use the future with "will" when using "when" or "if")