htacess tuned for better performance. Tested with yslow and pagespeed

.htaccess

<IfModule mod_expires.c>
  # Enable the module 
  ExpiresActive On
 
  # Default expiration of 2 weeks
  ExpiresDefault A1209600
 
  # Expire CSS, JS and images content after 1 day.
  ExpiresByType text/css "access plus 1 day"
  ExpiresBytype text/javascript "access plus 1 day"
  ExpiresByType image/gif "access plus 1 day"
  ExpiresByType image/jpg "access plus 1 day"
  ExpiresByType image/png "access plus 1 day"
  #Expires flash after 1 week
  ExpiresByType application/x-shockwave-flash "access plus 1 week"
</IfModule>
#You must take care to make this decision of remove Etags,
# in webservices this can be usefull!
<ifModule mod_headers.c>
  #<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)(\.gz)?$">
  #  Header unset ETag
  # FileETag None
  #</FilesMatch>

  Header unset ETag
</ifModule>
FileETag None

# BEGIN Gzip
<IfModule mod_deflate.c>
  AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript
  SetEnvIfNoCase Request_URI .(?:exe|t?gz|zip|iso|tar|bz2|sit|rar|png|jpg|gif|jpeg|flv|swf)$ no-gzip dont-vary
  BrowserMatch ^Mozilla/4 gzip-only-text/html
  BrowserMatch ^Mozilla/4\.[0678] no-gzip
  # MSIE masquerades as Netscape, but it is fine
  BrowserMatch \bMSIE !no-gzip !gzip-only-text/html

  # NOTE: Due to a bug in mod_setenvif up to Apache 2.0.48, the above regex won't work. You can use the following
  # workaround (comment the above line and uncomment the below line) to get the desired effect:
  # BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

  # Make sure proxies don't deliver the wrong content
  Header append Vary User-Agent env=!dont-vary
</IfModule>
#END Gzip