I have a workflow that's updating a field on an object, but I don't want to have to manually touch each record to have them update. I saw mentioned that you can actually touch records with dataloader to force the updates. Can anyone shed any light on this for me please? Would you just update all the records to a new last activity date or something?
You don't need to actually modify any data on the record, simply perform a touch.
EDIT: I should mention that you still need to make sure the workflow rule's evaluation criteria is met, or it won't have any effect.