Hello,
I want to share with the developers in this forum very helpful article I wrote lately. It's about how to optimize our smart contract code with less gas costs for each contract method. If anyone of you have any other ideas or examples how to lower down the gas costs please share them here and let's discuss. My article can be found here
https://linkedin.com/pulse/solidity-smart-contracts-how-gas-greedy-miroslav-nedelchev/ .