A lotus to represent a new beginning, or going through a struggle and emerging from that struggle and becoming a symbol of strength. The symbol "Om" from the Buddhist mantra to stand for love, kindness and protection...this symbolism is also said to purify hatred and anger.
A Wave is symbolized as one of the strongest forces on earth. so strength for one. also if you read more into it, its about faith, a wave is you against mother nature, you cannot control it, you just have to put your faith into her.