diff --git a/presentation/presentation.md b/presentation/presentation.md
index 79fa3ef..8a6b691 100644
--- a/presentation/presentation.md
+++ b/presentation/presentation.md
@@ -241,3 +241,20 @@ better choices than you.
 
 Some examples:
 
+```latex
+\newcommand{\R}{\mathbb{R}}
+\newcommand{\bb}[1]{\mathbb{#1}}
+\newcommand{\un}[1]{\ensuremath{\, \mathrm{#1}}}
+```
+
+## Further reading
+
+- Everything on Overleaf.com
+- Documentation for packages on CTAN
+- StackExchange
+
+\vspace{2em}
+
+> Tip: Keep it simple, stupid!
+
+More packages $\neq$ better document