Plagiarism Check - Best way

I doubt if one can achieve 100% unique content. And does it matter if we use a phrase like 'He took a sip...' which many others have already used?  I don't feel that such things make your content non-unique. 

when someone checks for the plagiarism and if the results show less than 80% due to the above phrase.. it doesnot sound good right?

Who is going to check? 

I randomly check my article before I submit  

I checked out this tool. Don't go for this, its utter rubbish. It just picks out sentences from your submitted text and searches them on google. You can do that yourself too, no need of a checker.

You can do that yourself too, no need of a checker.

It automates the task. 

oh... then do suggest some plagiarism checker... how to indiblogger checks it? 

I entered one of my posts in it and it showed 0% original - as it found that text on my blog 

That tool would have been a bit useful if it had the option to exclude certain URL's 

yes.. of course it will :) it will be useful only before you post 

1- smallseotools.com plagiarism checker is one of the best checkers out there. It checks every sentence. But it takes a long time to check and the way search engine detects copied content is different. It's mainly useful for writing some journal or project and make sure none of your work is already published. By none I mean not even a sentence. 

2- many paid tools are great but not worth it. 

As for the free tools I use - duplichecker.com

It allows plagiarism check for around 1000 words (not sure check it out). It also shows the matches found and highlights the content that has been copied. This is really a nifty feature. 

But because it allows only 2 checks for free (without signup), there is a trick to bypass it. 

Download a chrome or mozilla extension which deletes browser cache. Just search for "remove cache"  or "cache eraser". This was you can check your content as many times you want by clearing the cache. 

3- search engine are a lot smarter than we think. As per most webmasters and Internet marketers, uniqueness above 70% should not be a problem really. But coping famous quotes and speeches is fine. 

Apparently, I'd you write something on your own, it'll easily be unique. 

Damn, auto-correct ! 

I guess, one ot the best ones is a simple google search. Just select the sentence/excerpt and google for it. Though, here you need to do some work of checking the results yourself.

For textual content there are still ways to check for plagiarism, but it becomes quite hard in the case of images. It becomes quite a cumbersome task when plagiarism involves images.