Don't worry about it, it's probably one of the strangest English conjugations that I can't imagine would be easy to get a hang of! Just remember:
The three basic parts of virtually every declarative clause are the object, the action that the object performs, and the not-always-necessary subject, which the action interacts with. To add further definition, you can also extend clauses by using prepositions, or link another using determiners and so on. This is all obvious, I'm just colour-coding some things.
- 'Remember' is used as such: You remember. The act of remembering does not require a subject, as giving context as to what's being remembered can either be done elsewhere, or immediately: "You remember something!"
- 'Remind' is used as such: You remind someone. If the object is performing the action of reminding, since you can't simply 'remind' on your own without having someone or something at hand to remind, it requires a subject in order to form a complete clause. To define what's being reminded (since the subject is already in use), you need to extend the sentence with a preposition (You remind someone of something) or create a new clause with a determiner (You remind someone that they need to drink water).
That was probably way more fun to type than it was to read, I totally got carried away. Well, despite that, I hope it manages to clear something up!
/real end of off-topic now, maybe