When you encounter some logical markup, i.e. some things that belong to the same “class” and should be displayed equally (like names etc.), don’t use \textit
and the like to format them but instead define a new macro to format those things. Then you’ll be consistent and you can change things later on quite easy.
Example
In your text there are lots of names, that should be – at the moment – displayed in italics. Then define a macro \person
(or what ever you consider a meaningful name for these things) to format the output:
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\newcommand{\person}[1]{\textit{#1}} % later in your document \TeX\ was invented by the great \person{Don Knuth} and \person{Leslie Lamport} created \LaTeX\ on top of it. |
This gives you the opportunity to change the styling later and even do some fancy stuff like highlighting only the first occurrence of a name or generating an index with those names etc.
Some will say: “But I can just search and replace \textit
later.” Yes but not if you used it also to format book titles or other things that should keep the italic format ;-)