Return unique list element when inputting

I am trying to return a unique element from the list when user proceeds with the program, I tried with converting list to set and back to list, but there was no success. The initial code with duplicates is:

import random

topics = ['Technologies', 'Lifestyle', 'The meaning of life', 'Family', 'News', 'Vacations']

def ready_steady():
    ready = input('Ok! (q to quit, enter to continue):')
    while ready == '':
        print(random.choice(topics))
        ready = input('Ok! (q to quit, enter to continue):')
    if ready == 'q':
        break


ready_steady()