Think of x Think about

Think of acompanha um pensamento que acabou de surgir ou que seja/tenho sido passageiro.

Think about acompanha um pensamento que, mesmo por pouco tempo, foi analisado e ponderado.

When he told me he needed someone for the job, I thought of you immediately.

I thought of you yesterday.

I was thinking about buying a new car.

Think about it before you make a decision!