Rotate trainers onto different topics.
Encourage using a variety of training methods.
Promote your program to management and get their verbal and public support; ask management to personally encourage trainers.
Present a realistic and ambitious budget that provides for all your training needs.
Encourage and provide for ongoing training and career development for trainers.
Assess your training audience ahead of time and provide trainers with language-appropriate materials and cross-cultural information.
Arrange for trainers to visit the operations in which they train on a regular basis to keep current on new methods.