Prefer constructs/aliases such as selfdestruct (over suicide) and keccak256 (over sha3). Patterns like require(msg.sender.send(1 ether)) can also be simplified to using transfer(), as in msg.sender.transfer(1 ether).
selfdestruct
suicide
keccak256
sha3
require(msg.sender.send(1 ether))
transfer()
msg.sender.transfer(1 ether)