Staying Motivated.....or the lack of

I seem to be really struggling with my weight this year.  I have periods of success, but those don't often last long.  What ever I do, I just can't seem to stay motivated.  I know my husband has a lot to do with it to, he goes on these sweet binges every now and then & takes me with him.  But...I still have no one to blame but myself.  I have to find something and stick with it no matter what.  Something that will help give me the motivation and success I need to overcome my weaknesses.  I also have hypothyroidism, which I'm not saying is an excuse by any means, but it does make it harder for me to lose weight.

I'm thinking about giving Shakeology a go. But I have read so many mixed reviews.  And then there's exercise - I will go strong for a week, then slowly fade and stop all together.  So what's your trick to staying fit, staying motivated and just doing it!?!  Help!! lol!