I'm using a lot of resources but most of them isn't very useful and distract my attention. For the most part I use icodrops.com for the quick ICO review because these guys filtered the ICOs before adding on their site. If I want to see new events(meetups, conferences) I would use coinmarketcal.com for that. It's the most convenient calendar in my opinion. But there are plenty of them. Just google "cryptocurrency calendar" and you will find enough options for you.