tips & tricks docs section restored (#87)

docs/src/user_guide/setup/tips-and-tricks.md

@@ -1 +1,30 @@
 # Tips & Tricks
+
+### FSRS4Anki
+
+I _**highly**_ recommend using the [FSRS4Anki add-on](https://ankiweb.net/shared/info/759844606). If you have a
+non-trivial amount of cards this will change your life. It optimizes the scheduling of cards and will drastically reduce
+the amount of due cards you have everyday.
+
+### Learning specific media
+
+If you want to learn a specific piece of media, e.g. a book, a movie, etc., then using a more specialized/targeted
+[frequency.csv](prioritizing.md#frequencycsv) can help you reach your goal faster than if you were to use a more general
+frequency.csv. You should only really do this after you have already learned **at least** the most frequent 2k morphs
+from a general frequency.csv--If you start to specialize too early you can fall into the trap of 'over-fitting'
+your vocabulary and understanding of the language.
+
+### Reverting AnkiMorphs changes
+
+There are a couple of ways to revert the changes AnkiMorphs has made to your card collection:
+
+- Restore from a previous backup you made.
+- if you haven't made a backup in a while, then you can use the following method to revert your collection to
+  how it was the last time you synced:  
+  `Browse -> Fields -> add a new field -> save -> Download from AnkiWeb`
+  <br>
+  <br>
+  <video autoplay loop muted controls><source src="../../img/revert_changes.mp4" type="video/mp4"></video>
+  <br>
+- If you only want to revert how AnkiMorphs sorted the cards, then you can do the following:    
+  `Browse -> Card State -> New cards -> Select all (Ctrl + A) -> Forget -> Restore original position where possible`