Gamescom, then I bookmark the trailer of games I’m interested at with their release date. A few months later I can just open the bookmarks and know what is releasing this month. Whenever I find out a game is delayed, I edit the bookmark with the new date. It’s very easy to keep track of new releases that way.
I do it this way, because I’ve had quite a few good games that I completely missed because of not checking the news in that week.