The default submit button is on the right below the form it is accociated with.
Additional action buttons should be on the left side below the object they are associated with ordered by significance from left to right, the most significant button being the left-most.
The reset button is on the left side below the form it clears. It is labeled "Clear Form". If there are additional action buttons for the same form the reset button is the right-most button of these.
Texts on buttons use headline-style capitalization, where the first and last words of the text and all other major words are capitalized.