A Bit Close Look At Vi - More On 'registers'

Note - read Marks & Registers before reading this post.

There are some other ways of copy or delete text in vi.

Working with paragraphs:

If you are in paragraph text you can use  }  and  {  to move  cursor to the beginning or ending of the paragraph respectively.  so if you want to move a paragraph you can use  {  and  d} . 
and   p  to paste the content.  if you are already in beginning or ending of a paragraph you can use   d}  and  d{  respectively to cut the paragraph.
If you want to delete 3 continuous paragraphs you can use  d3} (From current to next 3 paragraphs will be cut) 
And if you want to move multiple paragraphs from multiple locations to other locations we can make use of registers ( Marks & Registers ).

Ex:
I am at para 1: hit   "ad3}  to cut 3 paragraphs  to the register 'a'
I am at para 9: hit   "by}  to copy next paragraph to the register 'b' 
At EOF: hit  "ap  and  "bp   to paste the paragraphs.

Copy/Cut by Search:

Search using  /  or  ?  is most notable technique in vi. But if you want to copy the content from current line to the next line containing a specific word ??.
for example one can use  y/foo  to copy the text from current line to next line containing the word 'foo'. similarly 'd' can be used to cut ( d/foo).
y?foo to copy from the current line to the most recent (previous) line containing 'bar'.

Similarly as above we can use registers to copy/cut these content.
Thus if you use "ay/foo then you are yanking a copy of the text from here to the next line containing "foo" into the 'a' register. and can use   "ap  to paste the content.