I’m a big fan of the newest feature in GIMP called Single Window Mode. You have to add this PPA to get Gimp 2.8 in Ubuntu 12.04.
sudo su
add-apt-repository ppa:otto-kesselgulasch/gimp -y && apt-get update && apt-get install gimp -y
Open GIMP, click on Windows and click on Single Window Mode.
Yay!
