Celebrating a 30th birthday can be a fun milestone with various party ideas. Consider hosting a themed party, such as a 1980s retro or Hollywood glam theme, where guests can dress up and enjoy themed decorations. You could also organize a destination party at a beach or a cabin for a weekend getaway with close friends. Another great idea is to plan an outdoor gathering, like a backyard barbecue or a picnic in the park. Incorporate fun activities like lawn games or a photo booth to capture memories. Don't forget to include a delicious cake and a toast to celebrate this special occasion!