Marketing is crucial for the movie industry. Hollywood movies grossed over $26 billion in 2007, more than any other form of entertainment. However, very few movies actually turn a profit, so studios rely on just a few blockbuster films each year to generate profits. On average, marketing budgets were $35.9 million in 2007. Common marketing techniques include teaser and full trailers in theaters, advertisements in newspapers/magazines/TV/radio, websites and viral marketing, and billboards. Studios measure early success by box office grosses the first weekend, as 40% of profits can come then. Marketing is essential to convince audiences to see films at cinemas or purchase DVDs.