Q: i reset my iphone4s  now i cant get to my apps because i need icloud id and password but i forgot it what do i do

Find your AppleId: http://support.apple.com/kb/HT5625?viewlocale=en_US&locale=en_US

  https://iforgot.apple.com/appleid

how to reset password:

https://iforgot.apple.com/password/verify/appleid

Sorry, but without the correct Apple ID and password that has been used during the first setup of the phone, it can't be used anymore.

Check these articles for detailed info:

iCloud: Remove your device from Find My iPhone

iCloud: Find My iPhone Activation Lock in iOS 7

Is there a way to find my Apple ID Name if I can't remember it?

Yes. Visit My Apple ID and click Find your Apple ID. See Finding your Apple ID if you'd like more information.

How do I change or recover a forgotten Apple ID Password?

If you've forgotten your Apple ID Password or want to change it, go to My Apple ID and follow the instructions. SeeChanging your Apple ID password if you'd like more information.

copied from Frequently asked questions about Apple ID