There are some verbs which are usually only followed by -ing:
avoid, can´t help, delay, dislike, don´t mind, enjoy, finish, give up, go on, practise
I´ve finished preparing the salad.
I avoid staying in expensive hotels.
I couldn´t help laughing when he fell over.
I´m trying to give up smoking.
I dislike doing the washing-up after a meal.
I always enjoy trying new dishes.