For the purpose of explaining this concept I will make use of the well know example of loosing weight.
How many people do you know that haven't managed to loose weight. Or maybe lost weight, but gained it again or haven't managed to pull it through to actually use a significant amount of kilos? Maybe even you belong to that group?
I've been gaining too much weight recently. In the end of September I ran a marathon - even though my body was actually not fit. Yes, now there might be some of you who say 'wtf, you ran a marathon. Saying that you were not fit is kinda ridiculous.' Well, indeed, I managed to run a marathon, but my body didn't feel fit and also in terms of body fat I was not in good shape.
After the marathon it got even better (irony). Considering that I just ran a f*** marathon, I thought I can easily deserve some time out and did even less sports but more eating instead.
Now I am at a stage where I am close in not fitting into my last pair of pants. Yes, you read correctly.
It is tough going back. It is getting winter. When I wake up it is not sunny outside, the motivation is low and blablabla (insert excuse of your choice). A Trojan Horse in that sense is one single change that will secretly affect other areas of your life.
For example: taking the stairs might help you get the desire for more exercise. Lucky that you want to get the most out of your exercise, thus eat better. And boom, 3 months later you are a machine (ok, that was a quick jump, but you get the point).
My Trojan Horse is actually sports. As soon as I do sports I feel better, more athletic and an athletic person gives everything to improve, instead of throwing everything away by eating a pizza afterwards.
Or maybe your Trojan Horse is not doing something small, like not smoking the last cigarette of the day. Just by leaving out the last nicotine push at night for a week, might work wonders.
What small change can you think of that you can change about yourself? Or maybe trigger other people in doing which they are more willing to take, instead of tackling the big obstacle directly?