Smart Newline

If you press Ctrl+Return, Kile inserts an intelligent newline. If your current position is inside a list environment, like enumerate or itemize, Kile will not only insert a newline, but also add a \item command.

If you are inside a tabular environment, Kile will finish the current line with \\, followed by the newline.

If you are inside a LATEX comment, Kile will start the next line with a %.

Even better, Kile is smart enough to support predefined LATEX and user defined environments, which can be added in section SettingsConfigure Kile...LaTeX.