I place all the custom buttons on the footer(each separate button for each service) .
when a user is on a particular page of the Google Ad WordsOrganic Search Marketing blog and he wants to bookmark the page then he just navigates to the botton of the page and clicks each of the many custom buttons given in the footer to bookmark the page to the respective bookmarking site.
W3school has a lot of development tools and tips in HTML, CSS and ASP. I'm also new to CSS and I've learned a lot through this site. I play around with CSS codes using Firebug too- an add-on in Firefox.