To build nice big house, need to have good earnings to have all the lovely trimmings. Same for palaces of Jannah, need dhikr. The more the better. Do continuously, in the heart.
Recite "subhanallah-wa-behamdihi subhanallahil-azeem", get one dome on your Palace, so do 7 times after every fardh salaah, or when you can - keep getting domes!
Recite "subhanallah-wa-behamdihi subhanallahil-azeem", get one dome on your Palace, so do 7 times after every fardh salaah, or when you can - keep getting domes!