There are number of options.
You can put it in MasterPage, LayoutPage or Display templates.
Here is the example.
<SharePoint:ScriptLink language="javascript" name="suitelinks.js" OnDemand="true" runat="server" Localizable="false"/>
<SharePoint:CssRegistration Name="Themable/oslo.css" runat="server" EnableCssTheming="true"/>
asim MCTS SharePoint 2007 -WSS 3.0