diff --git a/src/Applications/fstrim.md b/src/Applications/fstrim.md
new file mode 100644
index 0000000..cc0e49f
--- /dev/null
+++ b/src/Applications/fstrim.md
@@ -0,0 +1,7 @@
+# fstrim
+
+Enable and start service:
+
+```sh
+systemctl enable --now fstrim.timer
+```
diff --git a/src/Applications/systemd-journal.md b/src/Applications/systemd-journal.md
new file mode 100644
index 0000000..9a2d88d
--- /dev/null
+++ b/src/Applications/systemd-journal.md
@@ -0,0 +1,14 @@
+# systemd/Journal
+
+Edit `/etc/systemd/journald.conf.d/00-journal-size.conf`:
+
+```txt
+[Journal]
+SystemMaxUse=50M
+```
+
+After editing, restart service:
+
+```sh
+systemctl restart systemd-journald.service
+```
diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index 15cdbe3..bd1eea7 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -20,6 +20,8 @@
   - [HTTPie](Applications/httpie.md)
   - [systemd-boot](Applications/systemd-boot.md)
   - [systemd-swap](Applications/systemd-swap.md)
+  - [systemd/Journal](Applications/systemd-journal.md)
+  - [fstrim](Applications/fstrim.md)
   - [Blueman](Applications/blueman.md)
   - [dnscrypt-proxy](Applications/dnscrypt-proxy.md)
   - [OpenVPN](Applications/openvpn.md)
diff --git a/src/install-archlinux.md b/src/install-archlinux.md
index e127870..13f6d86 100644
--- a/src/install-archlinux.md
+++ b/src/install-archlinux.md
@@ -111,8 +111,6 @@ timedatectl set-ntp true
 
 ### Optimization
 
-Read [Solid state drive](https://wiki.archlinux.org/index.php/Solid_state_drive).
-
 Read [Improving performance/Watchdogs](https://wiki.archlinux.org/index.php/Improving_performance#Watchdogs).
 
 Read [Improving performance/Staggered spin-up](https://wiki.archlinux.org/index.php/Improving_performance/Boot_process#Staggered_spin-up).
@@ -123,12 +121,6 @@ Read [Silent boot](https://wiki.archlinux.org/index.php/Silent_boot).
 
 Read [Fonts](https://wiki.archlinux.org/index.php/Fonts).
 
-### Misc
-
-[Swap/systemd-swap](https://wiki.archlinux.org/index.php/Swap#systemd-swap)
-
-[systemd/Journal](https://wiki.archlinux.org/index.php/Systemd/Journal)
-
 ## [List of applications](https://wiki.archlinux.org/index.php/List_of_applications)
 
 ### [pacman](https://wiki.archlinux.org/index.php/pacman)