diff --git a/how_to b/how_to
index 5bb7c95..053c88a 100644
--- a/how_to
+++ b/how_to
@@ -19,6 +19,7 @@ Usefull packages :
     Desktop environment :
         dwm                 Dynamic Window Manager
         dmenu
+        sway
     Office :
         sent                Simple slides tool
     Misc :
@@ -28,6 +29,72 @@ Usefull packages :
         jedi-vim
     Pretty log pager:
         lnav
+    Backlight management:
+        light               # http://haikarainen.github.io/light/
+
+System setup:
+    display/drivers:
+        xorg-server
+        xorg-xinit
+        xorg-xev
+        xf86-video-{intel,amdgpu,etc...}
+        xf86-input-libinput
+        mesa
+        lib32-mesa
+        xinput
+        light  # backlight control
+        mesa-demos
+    desktop;
+        dwm
+        dmenu
+        dunst
+        libnotify
+    sound:
+        pulseaudio
+        pavucontrol
+        alsa-utils{,-runit}
+    tools:
+        kitty
+        zsh
+        git
+        vim
+        xsel
+        xclip
+        htop
+        ncdu
+        usbutils  # contains lsusb
+    arch:
+        trizen
+        highlight
+    multimedia:
+        imagemagick
+        feh
+        mpv
+        mpd
+        ffmpeg
+        youtube-dl
+        qrencode
+        maim
+        gimp
+    security
+        keepassxc
+    connectivity:
+        wpa_supplicant
+        networkmanager{,-runit}
+        qutebrowser  # With jblock
+        openssh{,-runit]
+        liferea
+        bluez{,-runit}
+    fonts:
+        ttf-Hack
+    mail:
+        neomutt
+        fdm
+        isync
+        msmtp
+        notmuch
+    misc:
+        miscfiles
 
 
 keyboard :
@@ -218,12 +285,13 @@ Drag & drop files:
 Fix hardware clock (with chrony):
     sudo chronyc
         makestep
-    trimrtc
+        trimrtc
         quit
     Alternative to trimrtc:
         sudo hwclock --systohc
 
 Network Manager:
+    # Yes it is bloated, but it #JustWorks(TM)
     nmtui : add/edit connections
     nmcli : informations
     Fix nm-applet/nmtui only working with root/sudo:
@@ -235,6 +303,12 @@ Network Manager:
             });
         sudo usermod -aG network <user>
 
+    Ethernet sharing:
+        install dnsmasq
+        Add new ethernet connection
+        Under IPv4:
+            select Shared
+
 Power saving :
     echo "vm.dirty_writeback_centisecs = 6000" >> /etc/sysctl.d/dirty.conf
     echo "vm.laptop_mode = 5" >> /etc/sysctl.d/laptop.conf
@@ -274,6 +348,24 @@ Video and audio editing:
     Gif to mp4 for browsers/the web:
         # https://unix.stackexchange.com/a/294892
         ffmpeg -i in.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" out.mp4
+    mp4 to gif:
+        # https://superuser.com/questions/556029/how-do-i-convert-a-video-to-gif-using-ffmpeg-with-reasonable-quality
+        ffmpeg -i in.mp4 -vf "fps=10,scale=320:-1:flags=lanczos,split[x][z];[z]palettegen[y];[x][y]paletteuse" -loop 0 out.gif
+    Convert video to YUV420 for the Web:
+        # https://stackoverflow.com/a/37969294
+        ffmpeg -i 1/25359.mp4 -vf "scale=2*trunc(iw/2):-2,setsar=1" -profile:v main -pix_fmt yuv420p out.mp4
+    Record screen:
+        # https://www.reddit.com/r/linux/comments/8n3ylp/screen_recording_in_x11_with_ffmpeg/
+        ffmpeg -video_size 702x779 -framerate 30 -f x11grab -i "$DISPLAY+0,19" out.mp4
+        # With some sound capture
+        ffmpeg -video_size 702x779 -framerate 30 -f x11grab -i "$DISPLAY+0,19" -f pulse -ac 2 -i default out.mp4
+        # How to get window geometry
+        xdotool selectwindow getwindowgeometry
+        # Awful one liner
+        # About the YUV420 conversion: https://stackoverflow.com/a/37969294
+        xdotool selectwindow getwindowgeometry | awk '/Position/{printf $2" "$4" "} /Geometry/{printf $2" "}' | sed 's/)//' | read OFFSET SCREEN SIZE; ffmpeg -video_size $SIZE -framerate 30 -f x11grab -i "$DISPLAY.$SCREEN+$OFFSET" -vf "scale=2*trunc(iw/2):-2,setsar=1" -pix_fmt yuv420p out.mp4
+    Filter doc:
+        # https://trac.ffmpeg.org/wiki/FilteringGuide
 
 ImageMagick:
     crop to aspect ratio
@@ -714,6 +806,12 @@ Android diagnostic debug phone codes:
 Android wpa_supplicant conf file path:
     /data/misc/wifi/wpa_supplicant.conf
 
+Grub2 theme customization:
+    theme.txt reference:
+        http://wiki.rosalab.ru/en/index.php/Grub2_theme_/_reference#Main_file_syntax
+    Example theme:
+        https://github.com/shvchk/fallout-grub-theme
+
 Limit bandwidth, download/upload speed of process:
     Non-forking processes
         netbrake -r <bytes per sec> <program> [args]
@@ -721,8 +819,52 @@ Limit bandwidth, download/upload speed of process:
     Pacman -> /etc/pacman.conf
         XferCommand = /usr/bin/wget --limit-rate 100K --passive-ftp -c -O %o %u
 
-Grub2 theme customization:
-    theme.txt reference:
-        http://wiki.rosalab.ru/en/index.php/Grub2_theme_/_reference#Main_file_syntax
-    Example theme:
-        https://github.com/shvchk/fallout-grub-theme
+Qutebrowser
+    Adblocking:
+        https://gitlab.com/jgkamat/jblock
+    Config:
+        :set auto-save.session true
+
+Alsa set default card
+    Get list of cards:
+        $ aplay -l
+    In ~/.asoundrc:
+        pcm.!default {
+            type hw
+            card <name|id>
+        }
+        ctl.!default {
+            type hw
+            card <name|id>
+        }
+    Testing:
+        $ aplay -D default:PCH /usr/share/sounds/alsa/Front_Center.wav
+
+mpc/mpc shuffle whole library and save as playlist
+    $ mpc crop && mpc listall | mpc add && mpc shuffle && (mpc rm all; mpc save all)
+
+GNU miscfiles:
+    Dictionary wordlist
+    Airport codes
+    Chat abbreviations
+    Cities/countries list
+    Currency ISO code
+    list of connective words
+    phone country codes
+    north america area codes
+    C operator associativity
+    Imcomplete proper name list
+    Unicode characters
+
+Dictionary:
+    sdcv  # CLI stardict tool. Dictionaries not included
+    stardict-wornet  # English dictionary (AUR)
+    miscfiles  # GNU miscfiles project include a wordlist file
+        grep "word" /usr/share/dict/words
+
+Gandi for server setup:
+    Dynamic DNS:
+        install gandi-automatic-dns (AUR)
+    Let's encrypt/letsencrypt:
+        install certbot-dns-gandi-git (AUR)
+        # Email address is kept private