Not all board games are created equal. For every straightforward title such as Catan, there's a depressing complex Arkham Horror. Fortunately, you don't have to go wading through the rulebooks for these more challenging-to-learn games -- you can instead grab a cheat sheet from online repository The Esoteric Order of Gamers.
Not every game in existence is covered, of course, but there is a very healthy quantity and the more in-depth ones, including the aforementioned Arkham Horror, Game of Thrones and Merchants and Marauders do feature, taking the pain out of diving into your new board game purchase.
The last thing you want to do is get bogged down by rule after rule and the summary sheets provided by EOG are not only concise, but cover some of the more hairy situations that can arise when the official guides come up short.
They're all available in PDF form and are formatted in such a way they can be easily printed out, but there's nothing stopping you from having them up on a tablet for easy reference.
So, next time you go board game shopping, there's no need to feel anxious about picking up something that could turn people away -- it's likely EOG has a summary sheet just waiting for you to download.
Games [Esoteric Order of Gamers]