Can anyone give me advice on how to start controlling my T1 Diabetes?

I've had diabetes for 11 years now and for the past 3/4 years it's been completely out of control. I want to be more responsible with it and I feel like I should come up with an improvement plan to make it easier and more achievable. So, can anyone give me advice on a starting point? (Personally I was thinking I should check my bg more often)