I'm definately not a bodybuilder but I am a big fan of submaximal training and incomplete rest periods.
I really feel that it has contributed to me being able to continue using HFT and high volume into my 40's.
Density training enables submaximal training very efficiently.
Something else that has been great is sandbag training. Sand forces high motor unit recruitment, intense stabilization and flexibility with lighter weight than you would use with more rigid tools.
"There's no such thing as shaping and toning. Only stronger and weaker." -Mark Rippetoe