Make it Funny
Successful humor, I think, requires a delicate touch. That's not true. Humor can be done crassly and with broad strokes. It can be absurd and over the top. It can be pointed and mean-spirited. Humor comes in a variety of blends. As a writer (and I use that term very loosely), I know that I attempt to add humor to almost everything I write. It's a seasoning. Writing something funny for the sake of being funny comes across as forced and unnatural. It's like watching a comedy and knowing the situation presented was ridiculously manufactured or wrought for a specific punch line.
Humor, on a continuous basis, is difficult to achieve. As with any type of writing, levels of success and effectiveness are dependent on subject matter and the author's creativity. It requires making connections between disparate ideas and concepts. It requires astute observation and the ability to articulate nimbly. Finding the humor in a situation requires having a slightly different perspective than everybody else. This is true, at least, if one wants to be seen as bringing freshness to a topic or event.
I think it's funny that a post about humor can be so dry and unfunny.

That the best thing about humour. It is definately unpredictable and only it a certain target group. Like an editorial.
Humor is unpredictable. One never knows if anybody else is going to "get" the joke. The best you can do is write whatever tickles your funny bone and hope others will appreciate it.