I have a few for me personally:
1. Not eating enough or frequently enough. I sort of feel like this sabotages my efforts and last year I did struggle with the food. Like not eating enough during the day and overeating at night. Now I just eat when I'm hungry and 99% of the time I stop when I'm full. So, I basically eat like all day now haha. I feel like a snackster now, but you know that is what I like as I don't like having big meals anymore.
2. The "all or nothing" attitude or being "on plan." For me, this was a negative thing. There is no "plan" for me. It is my life and I felt like I was a dieter last year and I remember saying to my doctor how I needed to start getting into a more positive frame of mind and learn how to shift to this being a lifestyle because dieting = temporary for me and it also = feelings of being deprived. Now I'm making healthy decisions for myself, but I don't feel like I'm being deprived or dieting. In fact now I feel like there is almost too much food for me to enjoy...ack!
3. Putting too much feeling into those scale numbers. Yes, they are frustrating and I do weigh often currently, but I used to freak out if the scale didnt' say what I wanted it to. Okay, so it is up a few pounds, or down, or whatever...no big deal. You can't build Rome in a day!!!

I'll get there!
Currently the negative thing I'm doing and working on:
EXERCISE! I am working on this struggle. I'm going about it all wrong I think. While I enjoy exercising, getting myself to do it is rough and doing those things on a routine basis is hard for me. So like my food and "dieting" issues I'm changing the way I think about it and solving it my own way. I'll get there!

I think part of my issue is I get bored doing the same thing over and over again so i'm looking for more variety. I'm the same way with food, I need variety.