Database design

I have got a design issue.I have got 4 tables,having relationships.Now,user will edit records and save them,but I want to save the values which were exixsting before they were edited and saved.Implying,if a record is edited 50 times,then the values of each edit needs to be saved.How best ,can I achieve this.I can see 2 answers, there may be more.
1. Fire a trigger on the before update that would collect the data and populate it some where else.
2. Use Stored procedure to do all updating and inserting then you can add code to each procedure that would grap the values before it updates.

I would go with the SP Method as triggers can get busy.|||Indeed ... create a history table where each time an update happens you will save a record|||Here is a nice Generic audit trail trigger code:

http://www.nigelrivett.net/AuditTrailTrigger.html