You just have to use your judgement and laugh at what you find funny on your own, if you need peer pressure (opinions of others) to find something funny then it's not really funny to you and maybe isn't even funny for many people to begin with.

This might be controversial but maybe many Sitcoms that do this were never funny in the first place and used laugh tracks because try as they might they had to force people to find it funny via artificial peer pressure, that either constitutes of a crowd being told to laugh on cue, or a recording of them doing so, which is what a laugh track is.

Here's the key point and why we stopped using them, things aren't funny, people think certain things are funny, and they also think plenty of things are not funny, and like it or not people are not always going to find the same things funny.