Update Google XML Sitemaps to 4.0.4
Make the tag backgroud color lighter
Add initial-scale=1 to viewport

When initial-scale is undefiend, media query's width always keeps the
value of portrait mode. For example, in case a tablet has 768px x 1024px
resolution, the width is always 768px whether portrait or landscape
mode. Therefore, the contents are enlarged 1.3X (1024 / 768) when in
landscape mode. But initial-scale=1 denies enlarging. See also
<http://webdesignrecipes.com/web-design-for-mobile-with-css3-media-queries/>.

The above web page says that the contents don't fit the window when
iPhone is turned from portrait mode to landscape mode with
initial-scale=1. But I can't confim that with iPhone 5 + iOS 7.1 and
iPad mini Retina + iOS 7.1.
Delete min-height of #secondary in @media (min-width: 1008px)

Because it seems iOS 7 doesn't support vh unit correctly. #secondary at
iOS 7 is too long. See also <http://caniuse.com/viewport-units>.
Delete #primary-navigation
Delete margin-right of search-toggle
Delete the bottom border from Top Posts

All ephemera widgets have "More ..." link under the boder, but Top
Posts doesn't.
Delete the simple list style for <=400px window
Design More about Me for 1 pane layout
Design a categories widget for 1 and 2 pane(s) layout
Design an RSS links widget for 1 and 2 pane(s) layout
Design a subscription widget for 1 and 2 pane(s) layout
Hide the repeated widgets at the footer sidebar for 1 and 2 pane(s) layout
Delete (max-width: 593px) media query

Because these CSS should be applied for all window size.
(max-width: 593px) means that these CSS are not applied for >593px
window.
Add comments about the number of the panes
Design About Me widget for 1 and 2 pane(s) layout

1 pane layout might not require this, but 2 panes layout does.
Design More about Me widget for 2 panes layout
Design More about Me widget for 3 panes layout
Design a categories widget for 3 panes layout
Design an RSS links widget for 3 panes layout