If you're going to boil it make sure to bring the water to a boil to begin with and let it stay hot for a while, it is possible to trap chlorine inside. When you put the wood in it will float for a while, let it settle on its own.
Be very careful of any industry up-river from where you got the wood! Antifungals will kill fish just as well as hammers! Remember to use carbon filtration for a while after you do put it in the tank.
Or you could go find some small driftwood pieces or bits at your LFS, stuff always breaks off the big bits when they're delivered and the driftwood they get in the store is chemically treated, sterilized, deionized and then hardened so no pH/alkalinity changes.