As a side note: I use my Facebook Business page as a mini-blog… on that I post 3 times per week; mon, wed, fri - all around the same times… and I average 7% to 10% of the audience ‘liking’ any particular post.
Keeping the quality up on a regular basis takes some work… again; start out how you intend to carry on. Overloading yourself and your readers in the short term; can kill both in the long term.
Hold that thought! It’s a keeper. 
For new blog, I update one post at least for one week. I will update at any time I feel free for my personal blog.
I feel like a good strategy is to “stockpile” articles. Queue up future articles so that you allows have at least a few scheduled for the future. This will allow you to stay on schedule even if something comes up or you just cant get yourself to write for a day or 2. Then if you can write a handful of articles the next day or 2 just queue even more. I always try to keep my articles ahead of me.
If you’re hard writer, dude. Sometimes I get articles from other site then update to my blog and indicate the source too. That’s the lazy way 
Unless you have permission from the ‘other site’, even if you ‘indicate the source’, that’s plagiarism and we don’t promote that here.
I don’t understand. Someone do a free advertising for their post and they don’t get it? Maybe you don’t like free gift Shyflower 
My indication is domain with link back to the source.
It isn’t a gift to steal my work without my permission to use it. Every web owner has the right to choose where their work is published. To steal something and think you are doing a favor for your victim is just backwards.
If it was a real gift, you’d make sure that the recipient agreed to accept it. Plagiarism is not only plain bad business, it is illegal and a good way to find yourself in a court of law.
So all websites are running and webmasters are writers who always have ideas for new posts to update the sites? As you said, do you mean: if you’re good in something, don’t do it for free? If it is what you mean about, I can agree with you. 
No, a lot of webmasters are not writers and they pay people like me to write their content for them. They don’t much like it when other people steal what they have paid for. Some of us, when we are good in something get paid for doing it. Stealing isn’t a high-paying job.
As someone who has SEO in their user name, it’s pretty basic to know how Search Engines view duplicate web content. You are certainly doing no one, including yourself, a favor by scraping another site’s content.
So cut the sarcasm. You are flat out wrong about what plagiarism is, what the penalties are, and trying to justify it is ridiculous.
I blog about web design and the practice shows that 2-3 articles a week is a must have minimum. Everything depends on the competition in your sphere.
How do you decide how often to post articles ? What’s the magic formula? There’s no definitive approach to figuring this out. As other has said, it depneds on your how you want to get regular readers on your blog.
It’s just my experience. 2-3 posts a week loo like a kind of scheme. Search engines see that your blog is alive, people like when you take care of interesting content (or just a content ) and blog’s traffic increases.
OK, I think that everything that needs to be said has been said and we’re going round in circles now. Thanks to all who contributed, but this thread has now run its course.