I'm designing a workflow that should update a Date field with Today's Date, based on each time there is movement on a custom field picklist.

1. Filed 1 Name: Job Status (Picklist)

2. Field 2 Name: Job Status Change (Date Field)

4. Evaluation Criteria Every time a record is created or edited

3. Specify New Field Value Selected:  *Use a formula to set the new value

ISCHANGED( SFDC_Job_Status__c,  NOW())