Ask HN: How do you organize your information?

I would like to know how do you organize your information. By "Information", I mean all the data you generate in your day to day activities, like sites you visit, bookmarks, data you download from internet, photos that you capture from your phone, thoughts that you write down, future appointments/dates that you need to be reminded of and any other stuff that can be stored digitally.

The reason behind organizing your data is that you should be able to retrieve it with ease in future, and not be lost.

I personally find it very hard to do so, and am looking for some suggestions on the best ways for this task.

Thanks.