This example inserts a continuous section break immediately preceding the selection.
Selection.InsertBreak Type:=wdSectionBreakContinuous
This example inserts a page break immediately following the second paragraph in the active document.
Set myRange = ActiveDocument.Paragraphs(2).Range
With myRange
.Collapse Direction:=wdCollapseEnd
.InsertBreak Type:=wdPageBreak
End With