Not biting your head off - please don't take it that way.
There is no need to change your thinking from what you used to do before. PA28R and and the TB series (I fly a '20), once you've got gear and flap down, are no different to their fixed gear counterparts. They don't "Glide like a brick" (I fly both - I know).
If you were flying approaches before that would enable you to reach the runway if the engine quit - that needn't change.
What I would say is don't be in such a hurry to go full flap on final. Leave it until you know you can make the runway, in full drag configuration, if the engine quits. Then, and only then, should full flap be applied