If you want to create buttons in your email or on your website that link to a particular web page, what you need to do is copy the complete address you want to reference and append it to the links below.
http://www.facebook.com/share.php?u=
http://twitter.com/home?status=
https://plus.google.com/share?url=
http://www.reddit.com/submit?url=
http://pinterest.com/pin/create/button/?url=
http://www.linkedin.com/shareArticle?mini=true&url=
For example, if you wanted to create a link to the CHANGE.ORG petition to have residency requirements for politicians changed to a 6 month minimum (and I hope you would sign this petition) which is at https://www.change.org/en-CA/petitions/conservative-party-of-canada-please-sign-this-petition-to-ensure-that-you-are-represented-by-someone-that-has-lived-in-your-riding-for-a-minimum-of-6-months , the links would look like:
http://www.facebook.com/share.php?u=http://www.change.org/en-CA/petitions/conservative-party-of-canada-please-sign-this-petition-to-ensure-that-you-are-represented-by-someone-that-has-lived-in-your-riding-for-a-minimum-of-6-months
http://twitter.com/home?status=http://www.change.org/en-CA/petitions/conservative-party-of-canada-please-sign-this-petition-to-ensure-that-you-are-represented-by-someone-that-has-lived-in-your-riding-for-a-minimum-of-6-months
https://plus.google.com/share?url=http://www.change.org/en-CA/petitions/conservative-party-of-canada-please-sign-this-petition-to-ensure-that-you-are-represented-by-someone-that-has-lived-in-your-riding-for-a-minimum-of-6-months
http://www.reddit.com/submit?url=http://www.change.org/en-CA/petitions/conservative-party-of-canada-please-sign-this-petition-to-ensure-that-you-are-represented-by-someone-that-has-lived-in-your-riding-for-a-minimum-of-6-months
http://pinterest.com/pin/create/button/?url=http://www.change.org/en-CA/petitions/conservative-party-of-canada-please-sign-this-petition-to-ensure-that-you-are-represented-by-someone-that-has-lived-in-your-riding-for-a-minimum-of-6-months
http://www.linkedin.com/shareArticle?mini=true&url=https://www.change.org/en-CA/petitions/conservative-party-of-canada-please-sign-this-petition-to-ensure-that-you-are-represented-by-someone-that-has-lived-in-your-riding-for-a-minimum-of-6-months
If you want the graphics to put these hyperlinks on they are just below on this page. Just copy / paste them into whatever your want (email, web page…) and edit them 
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