Loved Ygrec's idea
Something I'd add to that is write down what happens when you don't take your meds!!!
For me its pretty predictable (I know cos I've gone off them so many times ) and eventually I got the point that I know I'm better off taking them regularly and I actually do it!!!!
Couple of other ideas: maybe your meds need to be tweaked - It's harder to take them when they are not working properly...
And... for me I had to accept that I was worthy of being healthy and happy - at times not taking meds was a self destructive thing because I had low self worth and hated myself... seeing a T really helped me with that