Safety issues

Hallo everybody, I am new in Bitcoin world and I want to talk about safety issues.

Bitcoin's 7 Commandments
First Use only official Bitcoin client from Bitcoin.org. If you intend to use an alternative client, be sure to check first who created it and whether it has been approved by the Bitcoin community (preferably search the forum or ask a question).
Second Never download any software from the links provided by the users of this (or any other) forum without first verifying their sources. Consult with other members of this forum.
3rd Never download software from sites with Bitcoin without checking on the forum or website is legitimate.
4th Do not keep large amounts of BTC in the portfolio on the computer that you are using the Internet on a daily basis.
5th Back up your portfolio and encrypt them.
6th Do not use the new pages for Bitcoin (newly-arising lotteries, casinos, wallets, bureaux de change, etc..) Until you are sure that the author is a reliable member of the Bitcoin community.
7th Digging connect only to verified pool.
Shall we add something to this?