One common use for Bitcoin is making purchases online. There are hundreds of online shops and retailers that accept Bitcoin. Using a search engine like Spendabit you can search through millions of products, all available for purchase with Bitcoins.
BitcoinWide.com is a global, open and free platform to search businesses, organizations or individuals who accept Bitcoin and other Cryptocurrency.
You can also find many businesses listed in online directories.
There are also many local businesses, like cafes and restaurants, that accept Bitcoin. You can use Coinmap.org to browse thousands of businesses across the globe.