Simple Upstart Script to send a PushOver notification when the machine boots.

pushoverbooted.conf

#
# pushoverbooted service 
#
# Sends a PushOver notification when the box has finished booting. To 
# install, place this file in /etc/init/ You can test the service by 
# running 'start pushoverbooted' 
# 
# You will need to replace TOKEN with the value you get upon following the
# registration process for a pushover application detailed at: 
# 	https://pushover.net/api#registration
#
# You will also have to provide the USER_KEY for the account you wish
# to push to. This can be found in the PushOver app settings page on
# your device.
#

description "Pushover Machine Booted Task"
author "Daniel McCarney <daniel@binaryparadox.net>"

env TOKEN=REPLACE_ME_WITH_YOUR_APP_TOKEN
env USER_KEY=REPLACE_ME_WITH_YOUR_USER_KEY

#Exec when the machine gets to the graphical/network runlevel
start on runlevel [2]

#Fire off once and then terminate. Not a true 'service'
task

# Send the push notification
script
  # I like to capitalize the first letter of my hostnames for the push msg
  HOST=$(hostname | sed -r 's/^(.)/\U\1/g')

  /usr/bin/curl -s \
  -F "token=$TOKEN" \
  -F "user=$USER_KEY" \
  -F "message=$HOST has finished booting." \
  https://api.pushover.net/1/messages
end script

Maybe this will help you with the power saving script in the lab @davidbb

I'm debating writing one for shutdown as well.