IMDB is like Google, it's one of those services you use without even thinking about it. Whenever i want to find out something about a new movie or just find out who was acting in a movie or TV show i just watched IMDB is the place i go to.
If I ever need info on any movie IMDB is the place I go. It has reviews, critics reviews, the age certificate of the film, the year it was released, goofs, trivia, and a parents guide! It is fantastic.
Just rate a few of your favourite movies or TV shows and watch the recommendations roll in. If you choose to watch the recommendations with 7.5 or 8 out of 10 (or higher) you will never watch any rubbish again!