Use the maximum characters in your password.
Always set the password using maximum characters length, because it is simple method, if your password is longer then it is very difficult to guess.
Use the combination of lower-case and upper case letters in your password.
Normally computer users use the lower case in password selection but it is best practice to use the combination of both (lower-case and upper case). So using different cases in your password makes it much more difficult to crack.
Use the combination of letters and numbers in your password.
When you mix both letters and numbers just like one letter and one number then your password is more incomprehensible.
Avoid using the name of your family members as password.
Always try to avoid the name of your child, spouse, city and country name as password, because if any body knows about your personal life’s details then they try to use these detail to guess your password.
Use any tools to create random password.
There are many third party tools are available to create the random password. You can create passwords containing a very difficult –to-guess collection of random characters with these tools.
never recieve any files from any person ( even from the known ,
because ,most pplz r hacked by known pplz )only u can recieve files
from trusted pplz
Never open any untrusted websites
Never add any unknown persons in ur yim.
Avoid P2P file Sharing Through Yahoo Messenger
Avoid downloading .exe or .zip files from unknown websites
Avoid Clicking on Spammy Links
Don't download Yahoo Plug-ins from Unauthorized source