I would like to see A network go back to the 30 episode order for shows. As bad as 'Lost', 'Desperate Housewives', 'Heros', 'Jerico' and others repeat, they would be wise to order more episodes instead of having big gaps in the season. Use the alternative platforms (cable, online) to recover profits lost from reapeats.
Bring back the 'Quantum Leap Week' programming.
In the dead season of December and during the summer, The networks should program a Show of the Week, similar to what NBC use to do for 'Quantum Leap'. For 5-7 days of the week, show at least 1 hour, perhaps 2, of a specific show. The rest it while another show takes the spotlight.
Program a TRUE variety show. Take a page from the past to reinvent new programming. Have an 'Ed Sullivan' style of show. Comedians, Music acts, Extrodinary unknown people.