SQL Server 2008 :: Add A Trigger That Inserts Original Data From 1 Table To Another

I am trying to create a trigger on a table. Let's call it table ABC. Table looks like this:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ABC](
[id] [uniqueidentifier] NOT NULL,

[Code] ....

When someone updates a row on table ABC, I want to insert the original values along with the current date and time getdate() into table ABCD with the current date and time into the updateDate field as defined below:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ABCD](
[id] [uniqueidentifier] NOT NULL,

[Code] .....

The trigger I've currently written looks like this:

/****** Object: Trigger [dbo].[ABC_trigger] Script Date: 4/10/2015 1:32:33 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[ABC_trigger] ON [dbo].[ABC]

[Code] ...

This trigger works, but it inserts all of the rows every time. My question is how can I get the trigger to just insert the last row updated?

I can't sort by uniqueidentifier in descending as those can be random.