Hardware Wallet Recommendations
One of the safest & easiest ways to store your ETH, SPANK, BTC, ZEC, and many other coins is via a Ledger Nano S, a TREZOR or a KeepKey. Those are all hardware wallets. They all work with most wallet sites, and cost around $100. Some may want to gift you a hardware wallet, but this is extremely risky! It is best to buy straight from the source.
Why do you need a hardware wallet?In theory, as long as you keep backups of your keys, don't visit any malicious / phishing sites, never use remote access software, and don't install any malicious applications, you should be fine. However, it is still very easy to lose, misplace, destroy, or have your private keys and funds stolen. It only takes one mistake to lose everything.
The hardware options give you peace of mind, are easy to use, and are becoming a must-have for anyone storing more funds than they are willing to lose. I would personally recommend it for anyone storing anything over 2 weeks salary.
The device itself holds the keys and signs transactions for you. This ensures your keys aren't ever on any internet-connected device. Phishers can't get them. Malware can't get them. Keyloggers can't get them.
When you set it up you will write down your key (24-word backup phrase) and store it offline in a secure secondary location. This prevents you from losing access to your funds if something were to happen to your hardware wallet, and allows you to restore your funds on any future hardware wallet down the road.