Visual Studio HTML/ASPX editor can save you some time if you enable option Tools | Options... | Text Editor | HTML | Format | Insert attribute value quotes when typing. When this option is enabled, once you type a name of an attribute and following "=" symbol, Visual Studio automatically inserts a pair of quotes and invokes IntelliSense menu. After that you need only to select an attribute value from the menu and hit the Enter button. It's another nice timesaver.