diff --git a/journal/2021-01-30.md b/journal/2021-01-30.md
index e7225817d..a9d1827a6 100644
--- a/journal/2021-01-30.md
+++ b/journal/2021-01-30.md
@@ -38,6 +38,7 @@
 - [[cat heroin]]
 - [[intents]]
 - [[free]]
+- [[useful definitions]]
 
 
 ## [[doing]]
diff --git a/useful-definitions.md b/useful-definitions.md
new file mode 100644
index 000000000..f46a0d86e
--- /dev/null
+++ b/useful-definitions.md
@@ -0,0 +1,5 @@
+# Useful Definitions
+
+- A [[list]].
+- https://twitter.com/prerationalist/status/1355562141932281859
+