As a tour operator, I've found that the best online resources are essential for running a successful business. Some of my top picks include Rezdy, an online booking platform that streamlines reservations and payments; TourWriter, a comprehensive itinerary and quote management software; and TrekkSoft, an all-in-one solution for tour and activity providers. I also rely on TripAdvisor to stay updated on customer reviews and ratings, as well as the Adventure Travel Trade Association for the latest industry news and networking opportunities. These resources have truly made a significant impact on the efficiency and growth of my tour operations.