Macro for making numbered lists in vim?

Question

Often times it seems I have a list of items, and I need to add numbers in front of them. For example:

Item one
Item two
Item three

Which shoul

Answer 1

Here's an easy way, without recording a macro:

1. Make a blockwise, visual selection on the first character of each list item:

   ^2j
   

2. Insert a 0. at the beginning of these lines:

   I0. 
   

3. Re-select the visual selection (which is now all of the 0s) with gv and increment them as a sequence g:

   gvg
   

The entire sequence: ^2jI0. gvg.

A recording of the process in action.