If you want to open terminal easy way, you can do it by a right click from your mouse , so no need to open a from application> accessories or system tools .
Follow these steps to add a terminal button to right click of your mouse menu.
Under your gnome home directory go to hidden directory gome2 then go nautilus-scripts
make new file then with name : gnome-terminal and add this script
if [ -d $mydir ]; then
save and exit and make it executable with
chmod +x gnome_terminal
Now everywhere under your gnome with right click on you mouse , go under script and click gnome_terminal to start your shell ses