If you want to be really sure you don't forget something important, Remindr is a web-based service that pings cellphone, email, twitter account, and gTalk account simultaneously. There is no registration required, simply visit the site and plug in your information: the reminder, the date and time, and the info for the services you would like Remindr to use in notifying you. For another way of reminding yourself with multiple services, check out iReminder, an iGoogle widget. Remindr [via MakeUseOf]
