Investors & landlords

It has been a rental twice, from 2010-11, and again from Jan 2013 to present.  We lived in it May 2009 - June 2010, and again July 2011 to Jan 2013 (military).  Would property improvements include painting both inside and out?  Would it include new carpet?  Landscaping in the backyard?  An air-conditioning system?  Also - are all of those improvements mitigated if I have already taken tax deductions for them in previous years?  Lastly, what about fees associated with refinancing?  Same deal as the above?