//Screen Capture
//...to desktop
SHIFT+CMD+4
//...to clipboard
SHIFT+CMD+CTRL+4

//sharp, dash key #######
In Mac on British Keyboards I found it as ALT+3
//pound, pound key £££££££
In Mac on British Keyboards I found it as SHIFT+3
//euro, euro key €€€€€€€€
In Mac on British Keyboards I found it as ALT+2
//unix home, key ~~~~~~~~ Windows: Documents~1
In Mac on British Keyboards I found it as ALT+n

//Show hidden files in finder
defaults write com.apple.Finder AppleShowAllFiles YES

//Burn ISO CDs or DVDs
1) Create image with Disk Utility, uncompressed and CD/DVD master option
2) hdiutil makehybrid -iso -joliet -o Master.iso Master.dmg
3) Burn the ISO image with Disk Utility

//determine the device that is you CD/DVD drive
drutil status

//Install Mac Port from <a href="http://www.macports.org/" target="_blank">www.macports.org</a>
port search wget
sudo port install unison