The Start page is meant to contain only those applications you use regularly, the rest are on the All apps page.
The All apps page allows you to see the equivalent of Win7's 'Start Menu/All Programs' with all the folders expanded. On a single scroll-able screen no less!
You get there from the desktop in at least 4 different ways: 1 key-combo, 3 key-strokes, 3 mouse-clicks, or a pair of swipe-touch combos.
Keyboard:
1. WinKey + Q - Yes, really, the complete Stat menu/All programs in on key combination. :)
Keyboard Long-form:
1. Hit the WinKey
2. Hit WinKey + Z to open the app bar
3. Press Enter
Mouse:
1. Click in the bottom-left corner to go the Start page
2. Right-click on an empty space to bring up the app bar
3. Click 'All apps'
Touch:
1. Swipe in from the right and tap the 'Start'
2. Swipe in from the bottom and tap 'All apps'
How in the heck is that harder than old folder-based start menu? When it comes to visually finding your installed applications, Win8 is much EASIER than 7 as you can see them all on a single scroll-able page! That said, when at a keyboard, I just hit WinKey-Q. :)
Once you get your Start page customized, the apps you actually launch directly most of the time are a single click away, and _every_program_installed_on_your_system_ is clicks away.
Jorgie