There's ways of making yourself want to do them. Not necessairily healthy, but they do work. Also, there are times where deep down you want to both do and do not do something. For example, I absolutely hate being late, but I obsess over finishing something at the expense of being late. In the end, I just feel terrible, but less so when I do stop what I'm doing and be on time. Therefore, I use behaviour altering techniques to remove the obsession problem.
As for responsibility, the first thing to do is realise it's not bad. Generally speaking, the irresponsible are only that way because they don't like responsibility. Think of responsibility like money. It's not good or bad, it's all in how you use it. In fact, it can be a very useful tool in the hands of a skilled user.
Then you need to realise that you are responsible to yourself as well. That is, if you decide to do something, then that decision must be followed without deviation even if it makes you anxious. More often then not, you realise that the worry is unwarrented. This isn't to say that decisions shouldn't be changed if external factors arise, just that they should be taken very seriously. A decision is like a promise to yourself. It's a reponsibility.
Following these principals, one can create a plan, decide they will follow it and act with responsibility to it. It's not easy and there will always be external factors that change your plans, but as long as you value staying responsible to it, you can usually work through the difficulties. I'm not promising an panacea though, lol.
More then anything else though, your conscious and subconscious desires must be aligned if you want to maximise your results. If you have problematic thoughts, desires and temptations interfering with your goals, then you must alter the underlying behaviours, thought patterns and memories to stop them. Think of these things like habits. You have to learn a new habit of thought and behaviour, which can be done by repeated reinforcement just like any habit. This requires a significant investment of time into self-reflection, but it's definitly worth it.
Don't believe people who say you can't change these kinds of things. As long as you truely desire it, and even if you don't, it usually can be done. I've seen enough, and very extreme, examples to know this is the case. Often times, if there is no underlying strong desire, then one can be developed in a more benign way that you will more easily accept. Once the desire is established, you are all but garunteed success in implementing the targeted behavioural changes. Although, if you must go in this direction it make take a year or more to reach your goal, otherwise 1 to 3 months is a good figure.
