My problem with a lot of services listed below, is they all eventually go away, and all your data is off somewhere else. Unless you store your data locally in a human readable format (markdown) you are just putting all your data into a system that WILL go away at some point in the future.

Google has already had 2-3 services to manage your data that they have closed down. Maybe they are the ones that taught me not to trust your data with anything on the web.

Even something like Evernote is iffy, they seem like they are constantly on the verge of shutting down.

Although I do find it sad that that the human race as a whole puts so little value into this type of software, and so much value into sports and politics.