More raw data flying
Icarus Sun has a good idea but I would go further and remove the FD as well (FD is too easy) - pure raw data at least once a month
Unfortunatley the hysteria being created about level busts etc is having the side effect of reducing the overall skill level of the pilot population. In a complex SID or STAR only the very brave fly it raw data on a regular basis
Ideally, each pilot should fly a raw data SID or STAR once a month and allowance this should be included in SOPs. Extra briefing etc but the advantages outweigh the disadvantages. This avoids the embarrassment at the Sim when re-takes are the norm because everyone has forgotten how to fly raw data