Office Depot Earns Fall, Blames Weather  NEW YORK (Reuters) - Office Depot Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=ODP.N target=/stocks/quickinfo/fullquote"&gt;ODP.N&lt;/A&gt; on Wednesday  unveiled plans to muscle in on rival Staple Inc.'s turf to  boost sales and stem a fall in market share in the increasingly  cutthroat office supply business.