Article in English: If you don't have much experience with roasts, take some time to do research. Watch roasts of other people and figure out the techniques people use to get the most laughs. You can find roasts of celebrities on comedy channels or on the internet. Keep in mind that professional roasts may go a bit farther than you should, depending on your situation. For instance, if you're roasting your boss, you may need to tone it down a lot. Write down anything the person does that's a bit crazy or silly. Maybe the person has a habit of only eating food on separate plates or only getting in the elevator if there are fewer than five people on it. These little habits can be great for filling out a roast. For example, if the person you're roasting loves peanut butter and bologna sandwiches, that's a little outside of the norm and people may find it funny. However, if the person likes to send mean messages to people, that's not as fun. It goes against the norm, but it also causes emotional harm to people. Another good source for a roast is interesting interactions you've had with the person. Everyone has days where they're a little off, and how that person acted on an "off" day could be a source for a roast. Alternatively, if you have any memories where the person did something truly goofy, that could be a great story for a roast. For instance, maybe a person jumped into the pool (fully clothed) at an office party to save a box of donuts. You could use that to tease the person a bit. Often, the roast jokes that get the most laughs have an element of truth in them, but don't cross the line into being outright mean.  For instance, you might turn a mention of the one pair of pants that Joe wears to work that are just a bit too short into a riff on his Steve Urkel-esque fashion sense. But don't just attack the person's sense of style without any context, or berate them for wearing clothes that make them look fat. If you're having trouble coming up with enough material on your own, feel free to ask other people if they have anything...

Summary in Chinese:
看看别人怎么吐槽。 想想那个人有什么奇怪的习惯或怪癖。 回想一下让你记忆深刻的事。 可以对事实进行夸张，但不要捏造事实。 向其他人搜集素材。 吐槽明显的特点。