Great!
Make multiple Twitter account with one Email address.
but it's only if you have gmail account (go gmail.com and make easily if haven't)
Simple Make one twitter account with your email. Exapmle: inaamfirst@gmail.com (my account real {1})
Then for other account give same email with an extra dot. like "inaam.first@gmail.com" {1.2}
You'll get another account, but you'll receive this account's (2nd ac {1.2} email by twitter on same mail (real {1})
And if still you want to make 3rd account too so same add a dot in your email at another place like "ina.amfirst@gmail" {1.3} and make another account
Another Explainations:
I) How to Create Multiple Twitter Accounts with the Same Email Address
I) Use One Email Address with Multiple Twitter Accounts