Yes, that was a pun in the title, though a very simple and obvious one. Groans are appreciated.
Seriously, though, this week we need to talk about the importance of tenses and tense agreement, specifically through the lens of the style of your writing. Now, obviously, keeping your tenses straight when writing is critical. The tenses you use form what could be likened as time-stamps for the actions that are described in the book. When these time-stamps are misused, confusion reigns supreme!