As I went over in my last blog article, a simple addition you can make to your spree store is adding the SpreeFancy gem, adding an attractive theme to the base store. SpreeFancy is easy to install. Just add this to your Gemfile:
gem 'spree_fancy', :github => 'spree/spree_fancy', :branch => '2-1-stable'
And run bundle after that. Note: I am running a Spree 2.1 store, so I am using the 2-1-stable branch. If you are using another version of Spree, be sure to have the Gemfile pointing to the correct branch of SpreeFancy.