Obtained a visa from the embassy, made an itinerary, bought cash to convert after arrival, got travel vaccines updates and malaria medicine.
Be careful of people reaching into the car at intersections to sell you things. Don't flaunt your wealth. Barter for your items, if you look foreign they usually up the price, so offer half.
Make sure to visit Boti Falls, Aburi Garden, and the beaches around Accra.