We have added new custom fields to our default Account page layout and have made them required. The isue is that when people open exisiting accounts they are forced to fill in those required fields and as those records were created before the implementation of these fields that need to be set to blank. I have created a workflow as follows.
Record Type= Account
Trigger Event= Before modified record saved
Wait.
Update field after wait --> Field Name-->Custom Field 1--->Value ='Blank' (Pciklist Value has Blank as an option)
Update field after wait --> Field Name-->Custom Field 2--->