Smart Newline

If you press Shift-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.

Even better, Kile is smart enough to support predefined L^AT_EX and user defined environment, which can be added in section Settings->Configure Kile...->LaTeX.