Install Skype from repository

wget https://raw.githubusercontent.com/panticz/installit/master/install.skype.sh -O - | bash -

#!/bin/bash

# add partner repository
sudo add-apt-repository -y "deb http://archive.canonical.com/ $(lsb_release -sc) partner"

# update
sudo apt-get update -qq

# install
sudo apt-get install -y skype

Fix upside down webcam
wget https://raw.githubusercontent.com/panticz/scripts/master/fix_skype_upsidedown_webcam.sh -O - | bash -

#!/bin/bash

# install video4linux libraries 
sudo apt-get install libv4l-0:i386

# fix lib path
if [ ! -f /usr/lib/libv4l/v4l1compat.so ]; then
  sudo mkdir /usr/lib/libv4l
    if [ "$(uname -m)" == "x86_64" ]; then
      # 64 bit
      sudo ln -s /usr/lib/x86_64-linux-gnu/libv4l/v4l1compat.so /usr/lib/libv4l/v4l1compat.so
    else
      # 32 bit
      sudo ln -s /usr/lib/i386-linux-gnu/libv4l/v4l1compat.so /usr/lib/libv4l/v4l1compat.so
  fi
fi

# modify Skype launcher
sudo sed -i 's|env PULSE_LATENCY_MSEC=60 skype %U|env PULSE_LATENCY_MSEC=60 LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l1compat.so skype %U|g' /usr/share/applications/skype.desktop

Disable "contacts comes online" notification
# Notify
sed -i 's|1|0|g' /home/${USER}/.Skype/*/config.xml
sed -i 's|1|0|g' /home/${USER}/.Skype/*/config.xml

# Sound
sed -i 's|1|0|g' /home/${USER}/.Skype/*/config.xml
sed -i 's|1|0|g' /home/${USER}/.Skype/*/config.xml

Links
http://wiki.ubuntuusers.de/Canonical_Partner - Ubuntu partner repository
http://www.semanticpool.de/hidden-skype-emoticons/ - hidden skype emoticons
https://help.ubuntu.com/community/SkypeTroubleshooting
https://wiki.ubuntu.com/SkypeWebCams