There is no substitute for focused directed work with a purpose. Certainly just doing more work is not necessarily better. Have a laser like focus. Know specifically what you want to achieve. Make every exercise, drill, run, jump or throw count by having specific measurable objectives for each element of training. Also make sure the training session is in context of the whole training plan in order to insure progress toward the over all goal. Each segment of the training session should be carefully constructed so that one segment flows seamlessly into the next segment. The previous segment should set up and enhance the subsequent segment. No training component stands in isolation. Touch on all biomotor qualities with major emphasis on some and minor emphasis on others. Don’t try to do too much in any one session. If you are working with advanced athletes multiple sessions are referable to long extended sessions. Make less more.