The Family Handyman’s table saw crosscut sled
Sure, you can use a miter gauge for crosscuts, but once a panel you want to crosscut gets much beyond 12 inches or so in width, you are going to need to step up your game and think bigger. That’s why there are a plethora of plans out there.
This one, offered by the Family Handyman magazine, is simple to build and can bring a lot of accuracy to your project.
Oh, and if you want to make it even easier to build, MicroJig has a product called the ZeroPlay guide, which can simplify your construction and make your jig just a little bit more accurate.