I want to share with you my experiences in some altcoins!
1. Secure your walletpc with Firewall, Virus Scan and so on. Use in an ideal way KeyScrambler Premium
http://www.qfxsoftware.com/download.htm ! Yes, I know, it costs $45; but its the best software you should buy for your wallets. Imagine, what will happen, if your coins are more than $100.000 USD worth, and someone steal your coins because Keylogger!
Before step 2: GO OFFLINE NOW!
2. With new wallet, always encrypt it; that means, make a password of your wallet! In ideal way: it should include these kind of signs: '1' '&' 'W' 'w'...BUT NEVER BEGIN a password with '$'. I figured it out for a while, that a password beginning with '$' you can never unlock ur wallet more on linux!
3. Dump your privatekey and write the code on paper! in debug RPC window: a) walletpassphrase "your password" 999 b) dumpprivkey "your walletaddress"
If you have more than one address in your wallet, so you have to dump your privkey from every address! c) walletlock
And NEVER forget to RESET your debug after this; its the little trash sign in the right corner.
4. Make weekly backups of your wallet.dat
5. NEVER USE TEAMVIEWER from your walletpc. Don't ask me why, I am a technical noob, but there are infected ports, where some hacker always download your wallet.dat!
You can use of course TeamViewer: BUT NEVER from your walletpc!
If I forgot something, so let me know!
Greetz
Steve