Our types of Sample Sources and Samples have many user-defined fields assigned to them. For better organization, allow Admin to group user-defined fields into visual "sections". For example, when a user goes to edit a Sample Source or Sample, there might be tabs or another visual indicator in the view window to navigate easily between these sections.
It would also be preferable if users could view Samples and Sample Sources in the same display window that you would use for editing, without actually going into edit mode.