Steep, slow approaches are often uncomfortable and put you in the avoid curve (H-V curve) for longer; a very steep one can obscure the landing point and obstacles/wires etc.
Side slipping is a very fixed wing sort of technique but can be very effective - it tends to distort your IAS indications and can feel uncomfortable to pax. You need ETL if you are in an underpowered helo and if you sideslip to the hover and drop off ETL you will have a large power requirement at the bottom
Turns are good if you have the room.
As the others have said - if in doubt, go around and set it up properly next time.