In order not to forget..

Today, before going to part time job(at the youth hostel), I was asked to hang bed sheets of my parents, and my mom said that was in the wash machine. And I thought of course my mom is busy, OK, I'll do it later, no problem. And then, I completely forgot, I was watching TV and went to work.
And I came home, my parents prepared to sleep, my dad said, where is my sheets?? and I realized I completely forgot and felt so sorry. I could not have any excuse.
And now, writing the blog in English, this is what I decided to do everyday, now it has been 9 days since the last time I wrote, now I feel terrible about my responsibility and weakness of will.
Now, of course I don't wanna keep this, and I won't let this happen again, or optimistically I will decrease the number that happens, I have to think the strategy of not forgetting my job.
First, I came up that to make list. Writing down makes responsibility so much clear. Using iPod touch and write it in the To do list. But, I don't wanna use any tool to remember.
so, I have to imagine what will happen if I forget, this should be very good strategy. But, I still don't know what is the best. I have to keep this in mind anyway. But, the most significant thing that I have to change is that I completely don't have interest in those thing (house chores etc..) That makes me forget.