It can be very difficult to change your methods, especially if they are working. Change is hard. Change is uncomfortable. Change makes people feel redundant and insecure.
Despite this, change is an essential factor in success, be it in business, sport or life. Change prevents staleness and inoculates against complacency. However, it is not all bad. You do not have to change everything in order to find or maintain success. The trick is in the details.
Consider the following changes:
Keep your players, but change positions.
Keep your defensive system, but change how you tackle.
Keep your methods, but change your motivation.
Keep your line-out calls, but change your lifters.
Keep your place-kicker, but change his routine.
Even one of these small changes may have big benefits for your team. Change something, see it what happens, you can always go back!