List with arrows instead of bullets

I want a bullet list with arrows instead of bullets, like:

=> Line 1
=> Line 2


I tried this, but it returned some error:

\begin{itemize}{labelitemi}{$\Rightarrow$}[leftmargin=1em]
\item Line 1
\item Line 2
\end{itemize}


(I took the code from here) It should be simple, but I couldn't figure it out from enumitem's manual. How do I go about this?

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What's the error? Also, please provide a MWE –  recluze Nov 30 '12 at 9:36

I think the question you're linking to is meaning another syntax, but this works :

\documentclass{article}

\begin{document}
\begin{itemize}%[leftmargin=1em]
\renewcommand{\labelitemi}{$\Rightarrow$}
\item Line 1
\item Line 2
\end{itemize}
\end{document}

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In addition to the provided answers, if you use enumitem package, instead of redefining the label for all your itemize environments, you can define a new arrowlist environment which uses arrows instead of bullets, leaving the standard itemize unnaffected.

\documentclass{article}
\usepackage{enumitem}
\newlist{arrowlist}{itemize}{1}
\setlist[arrowlist]{label=$\Rightarrow$}

\begin{document}

\begin{arrowlist}
\item Line 1
\item Line 2
\end{arrowlist}

\end{document}


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 \renewcommand\labelitemi{$\Rightarrow$}

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