diff --git a/README.md b/README.md
index 6f547b5..7ddda42 100644
--- a/README.md
+++ b/README.md
@@ -178,6 +178,7 @@ Biases don't only apply to hiring. For instance, the fundamental attribution bia
 ### Data formats
 
 * [Falsehoods Programmers Believe About Phone Numbers](https://github.com/googlei18n/libphonenumber/blob/master/FALSEHOODS.md), Google's `libphonenumber`.
+* [Rules for Autocomplete](http://jeremymikkola.com/posts/2019_03_19_rules_for_autocomplete.html): rough specifications for autocomplete fields
 
 ### Data science
 
@@ -461,6 +462,7 @@ Rob Pike, [Go at Google: Language Design in the Service of Software Engineering]
 * ["I get paid for code that works, not for tests"](https://istacee.wordpress.com/2013/09/18/kent-beck-i-get-paid-for-code-that-works-not-for-tests/)
 * [Software Testing Anti-patterns](http://blog.codepipes.com/testing/software-testing-antipatterns.html), Kostis Kapelonis.
 * [Write tests. Not too many. Mostly integration.](https://blog.kentcdodds.com/write-tests-not-too-many-mostly-integration-5e8c7fff591c) for a contrarian take about unit testing...
+* [Testing is Not for Beginners](https://www.calhoun.io/testing-is-not-for-beginners/): why learning to test is hard. This shouldn't demotivate you though!
 
 ### Tools