Don't throw it all at them at once. Work out a suitable order for bringing in certain approaches and then tackle it one change at a time. Start out with the c

Don't throw it all at them at once. Work out a suitable order for bringing in certain approaches and then tackle it one change at a time. Start out with the changes that bring them noticeable benefits and you'll have a better chance of convincing them to adopt changes where they don't see the benefit to start with.