The funniest jokes are ones that are stories, and it was something that took off back in the 1960s. This type of humor is referred to as observational humor and tends to do a pretty good job of making people laugh. The classic example of observational humor is Larry David and Jerry Seinfeld, whose experience as stand-up comedians also led to the creation of two award-winning shows.
Their jokes rely on personal experiences, using them as fodder. The reason they work is that every experience is unique, which is why their stories are guaranteed original.
The best and easiest way for anyone to be funny is to highlight actual things that happened to them and situations that were awkward and funny as a result. This is far easier than trying to write jokes and come up with them. Usually, funny people keep track of everything they think is funny and then practice sharing it with everyone they know.
Back in the day, comedians would carry notebooks and then jolt down what they found funny. Many of these books have survived to this day, with variations of those jokes still being told.
Today, you can take notes on your phone. If you have a thought, that's funny, simply record it. Make an audio note of it. If you read a funny article, then save the link. Think of it this way, the world around you is a funny place and you within it is even funnier. Once you accept that fact, it will give you just about everything needed to be funnier. All you need is to document your stories.