DIFFERENT post or webpage. If you are looking to linking from one part of a page to another part in the SAME page, then refer to How to enable visitor to jump from one part of a page to another part in the SAME Page.
This is how you can link a particular spot in a page/post to a particular spot on a DIFFERENT page. Let's say you want this link Vitamin D to a particular spot on another post of another blog: Get a dose of sunshine. It is good for you, in particular to a particular word "Vitamin D" in that post, which can be the same or different blog.
What you have to do is to first get the URL of the target page, which in this case is:
http://foodasmedicine.blogspot.com/2007/01/get-dose-of-sunshine-it-is-good-for-you.html
. The visible word "Vitamin D" (link) that you see above is surrounded by a pair of HTML hyperlink tag as shown below (it is the actual HTML to display the link "Vitamin D" above):
<a href="http://foodasmedicine.blogspot.com/2007/01/get-dose-of-sunshine-it-is-good-for-you.html#XYZ" target="_blank">Vitamin D</a>
Note that the link is followed by a name attribute #XYZ where the name attribute XYZ can be anything you want. Then in the post editor of that other blog, you surround the word "Vitamin D" by a title, paragraph or division tags, for example, <h2 id="XYZ">Vitamin D</h2>
This had been done. You can click on the link "Vitamin D" above and see where it takes you. Note that clicking on the link "Vitamin D" at the top of this page opens up a new window to a spot in the middle of a page with the word "Vitamin D". If you don't need the link to open in a new window, just leave out target="_blank" in the HTML.
Acknowledge: This post is a result of a tip from ces1977 of Thirty Is the New Twenty