Formal:
* До скорой встречи! (Do skoray vstrechi!) - This is the most common and formal way to say "See you soon!" or "Until we meet again."
Informal:
* Пока! (Poka!) - This is the most common and informal way to say "goodbye" or "see you later."
* Увидимся позже! (Uvidimsya pozhe!) - This is a more direct translation of "see you later."
* До встречи! (Do vstrechi!) - This is a less formal way to say "until we meet again."
With friends/family:
* До встречи! (Do vstrechi!) - This is a very common and friendly way to say "see you later."
* Позже! (Pozhe!) - This is a very casual way to say "later!"
* Пока-пока! (Poka-poka!) - This is a playful and affectionate way to say "bye bye."
The best way to choose the right phrase is to consider the context and your relationship with the person you are speaking to.