Aum or Om is the most important symbol in Hinduism. Aum represents Brahman, and also is the humming sound in the creation story.
Swastika
The swastika is the second most important symbol in Hinduism. The swastika is also to be believed as sacred and represents luck and prosperity. The symbol is sometimes drawn during Hindu Rituals.
The Lotus
The lotus flower represents culture and politeness. The flower can be seen in some important Hindu deities. The lotus may be used in Hindu rituals.