Any other recommendations for segment space and i/o issues?

We have followed the recommendations from the Segment Advisor to shrink, compress and organize tables for space and i/o issues, we  see no changes.  We moved all indexes to a different tablespace in the fast recovery area, shrank, compressed and reorganized tables ( all on the same disk) , but we have the same recommendations for i/o in a new location.  We lost some items in the space recommendations, but most of them remain, including a non-existent table.  Is there anything else we can do?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       k