If you're asking yourself (or other people) this question, then it's very likely that it's not a good blog post.
So there are three things to consider here...
When you're not sure if it's good post or not, then it's probably pretty mediocre.
When you think it's the best post ever, it's very likely that it's your worst post ever.
And when you think it's the worst post ever, then it might be your best post ever...
Hmmm.
Now I'm wondering...
Is this the worst post I've eve put out there..?