I ended up w/ so many apps on my iPod that I just ended up grouping them into folders in ABC order, but still kept the most used ones on the home screen. I have lots of nieces and nephew (yes, 1 nephew) so I have a lot of kid games and those are in their own folders as well.
On my iphone, again I have the most used apps on the home page. I have a folder for "bills", (credit cards, banking, public storage, ATT, etc). I have a folder for bus schedules, one for utilites, ie calculator, calendar. I have a folder for weather and news apps I use most. I have a folder for survey apps. (I do surveys online for some side money). Then I have icons in the open that I use every day: Facebook, FB Messenger, app store, Mighty clock, Flashlight, Camera, Photos, Mail, Notes. In the bottom row I have the most important apps: Phone, Messages, Safari and Settings
I just restored my phone yesterday so I don't really have all my apps back yet, but that's how I layout my phone's apps