I think what you're asking (but correct me if I'm wrong) is how to format your content for easier readability.
If that's the case, then I can't link you to any sites that I take cues from, simply because there aren't any. I simply make my content easy on the eye based on whether or not I like the current formatting
From my experience (and from what I've learned 10-12 years ago when I researched this), I can give you these few tips:
1) your content needs to be presented in short bursts, ie. short paragraphs (2-3 sentences) of short sentences (10-30 words each). Aim for maximum 3 sentences in each paragraph, with each paragraph occupying no more than 4 lines of text in a 800+ pixels wide container.
2) text alignment should always be "justified"
3) spacing between lines of text I usually leave at 1.5 points, but sometimes - depending on the site's design and font used - it could be 1 point, or 1.2 points, you just have to try various ratios to see which one looks better. But, usually, 1.5 is the best IMO
4) the font of your text should probably always be one of these 4: Arial, Times New Roman, Verdana, or Georgia. I've heard many times people saying that Verdana and Georgia are the easiest fonts to read, and while I do agree with Verdana being easy to read, I don't agree with Georgia being easy to read. I seem to prefer Arial to Georgia most of the time, but that's a personal preference as you can see...
But the point is that - most of the time - these are the fonts that are easiest on the eye and which are used most of the time on most sites. Of course, I'm referring here to business / professionally looking blogs and sites, if you want to personalize your site with all sorts of wacky fonts you're free to do so. Artists, gamers, coders, etc can have their own unique styles that do not follow the rules I've mentioned above, and that's fine because the audience they're addressing to tends to think like them and like what they like, so it's OK for them I guess...
5) use sub-headings whenever possible as it makes reading easier. And depending on which fonts you use, the sub-headings could be bolded, too, but that's not always necessary. Again, try both options to see which one makes the text better
6) whenever possible, try to add bullet points / lists to your content because people can understand things much quicker if they see short lists (of 3-5 bullet points) of the points they're being presented instead of having to read a paragraph.
Some things that can (and should) always be turned into bullet points are:
- benefits
- features
- pros
- cons
- reasons
- causes
- symptoms
- effects
- types
- advantages
- disadvantages
7) also related to lists and bullet points, always use indentation for the bullet points because it makes the bullet points stand out even more. Just don't use a high indentation, centering the bullet points is bad for example, so aim for 2-3 points of indentation instead.
8) use as little underlining, bolding and italicizing as possible (preferably none). When it comes to text readability, less is always more, so keep the variety of formatting elements to a minimum so that the reading can flow smoother
9) the font size that's recommended most of the time is 14px, most people can definitely read 14px easily. But - and I might be biased because I'm wearing glasses so I do prefer larger fonts - I always write my content in 16px font sizes, it just helps me read better. But again, 14px is the standard size that most people can read easily, so you can stick to 14px for all of your writing and you'll be fine
