Trying to put a good end to an article, but how??

What’s the toughest part of writing a blog post? For a lot of people, it’s the conclusion. and that's a problem for me too.
I have been trying to find out how to put a good end to an article for some days. different websites are showing different results. but among them, I have found some points which can really put a good end. what have I found?? let me know you.

• Putting a conclusion: I have seen many good blog writers put a conclusion title and under that, they give a short note of their article. Generally, it's for the big articles and it puts a clean end.

• putting a summarize in the article: Summary is the quick flyover of an article. You can go step by step if you want, or you can just sum up the big idea in a few sentences or less. Those sentences allow you to reinforce your message and make it memorable.

• Putting a question in the end: I think this is the most interesting technique to put the end. Placing a question in your conclusion gets people’s minds moving.

So what do you think?? What is the best way??