I forgot the Apple ID but I can remember the password what can I do?

Check all of your devices for email addresses that you may have used you can go to iforgot.Apple.com and put your name and email in to see if you used each one.

See if you can recover the ID/password. Use every email address you can think of.

Apple ID - How to find your Apple  -  An iCloud e-mail address is an Apple ID.

Apple ID - Find  -       

Check out the first bullet point. Charging every night unless you use the entire battery everyday, is bad for the bottom half of the battery. It’s down in there but over looked 99% of the time.