One thing I'd really like os a good numbering scheme for plant equipment and procedures.
GE's equipment system numbering system is an example of one that works well if you fully implement it. Most importantly (in my mind) is that it includes the train/division indicator. Some plants (like my current one) use a Bechtel system, where the 455th pump added to the plant design becomes P-455, with no inidcation as to what train it is in. The 3 AFW pumps (il)logically become P-140, P-141, and P-504. Gues which one belongs to which safety train, because it's certainly not obvious!
Some plants really confuse things by using both the vendor and AE numbering schemes, depending on who added the component to the plant. Thus, in a given line the valve next to valve 1G33F001A (GE) is valve S1-1305-HV-9004 (Bechtel).
For Perry (at least in the old days), the equipment numbering system was even tied into the procedure numbering. Thus, the system operating instruction for the E12 (RHR) system was SOI-E12. The surveillance instructions for the system were SVI-E12-..., etc. This whole scheme made it very easy to find a procedure if you didn't know it's number.
A coherent numbering system is a big error reduction tool.