you don't.or 2 separate computers.
You can have two zwinky desktops open.
You are only allowed one account, as per Facebook rules. If Facebook suspect that two accounts from the same IP's are the same person, they will disable both accounts.
yes but you have to have a different account to add it on, also you cannot have one open and switch user and open the other! (it only allows one to be open at one time)
Use 2 different types of web browsers, like firefox and safari if ur on a macbook, otherwise idk.
i think you can have four
yes you can use accounts on two computer at same time.
You can't run two Steam accounts at the same time in either online or offline mode. Steam actually says, in their user agreement, that you cannot run two accounts from the same computer at the same time. While no one is sure what will happen, you still shouldn't try.
when debit and credit is same an a time
Google offers a multiple account log-in option which will allow you to have 10 accounts open in one browser at the same time. You can also open a google business account for $5 per person, per month. Google has several options for having your own account/site.
I had a litter of cats and assume they are the same but their eyes did not all open at the same time, but eventually all of their eyes will open.
Using two different computers, it's no impossible to do it on the same computer.
No only one account at a time and the same account can only be active on one PS3. You can have multiple accounts for the PS3 with only one actively signed in and the other accounts not signed in