How can I learn to be more obedient to my Husband and Master?

i always try to be submissive and feminine. i honor my husband and i've never disobeyed him or questioned his authority but sometimes he makes it really hard for me to submit to him.. like this morning he made me serve him breakfast naked as punishment for spending too much money on clothes shopping.. he wanted me to learn humility.. it was really embarrasing.. he wouldn't even let me close the curtains and im pretty sure that our nosey neighbors saw us.. well i guess i should be happy that i wasn't punished with his belt !!