This task is about using Jott to nag yourself. Jott uses your mobile phone to convert your voice to emails, SMS, reminders, lists and appointments, You can Jott to yourself, or you can link to other web services e.g. Google calendar, Blogger and Twitter to name a few. You can investigate more about Jott at their website, but it was created for the US market and isn't available in Australia.
Would I use it, if it were available? It could be useful for those things that pop into your mind suddenly when you are out on a walk or in bed and have to grope for a pen and paper - a sort of automated nagging list. As it isn't available, I'll have to rely on my memory and the odd pen and scrap paper.