Invest your engergy in coaching the team rather than pushing them.
If there is resistance to your ideas then you can:
* Try and understand the motivation behind the resistance
* Come up with better constructed arguments for why your approach is better
* Look to find quantative evidence as to why the current approach is not working well
The key here is to make people _want to change_ , rather than telling them to change. This will tend to make the changes you make more likely to persist.