Formal:
* Спасибо за все. (Spasibo za vse.) - This is the most general and polite way to say "thank you for everything."
* Благодарю вас за все. (Blagodaryu vas za vse.) - This is a more formal way to say "thank you for everything," used when addressing someone with respect.
Informal:
* Спасибо за все! (Spasibo za vse!) - This is a more casual way to say "thank you for everything," often used with friends or family.
* Спасибо тебе за все! (Spasibo tebe za vse!) - This is a more personal way to say "thank you for everything," used when addressing someone you know well.
You can also add a specific phrase to be more precise, like:
* Спасибо за все, что ты сделал/а. (Spasibo za vse, chto ty sdelal/a.) - "Thank you for everything you did."
* Спасибо за все, что ты мне подарил/а. (Spasibo za vse, chto ty mne podaril/a.) - "Thank you for everything you gave me."
Remember to choose the phrase that best fits the situation and your relationship with the person you are speaking to.