How to switch input languages with different key combination? I don't like to switch languages with ⌘ + space. Is there any way I can use more common keyboard combinations: 


Control + Shift or
Control + Opion or
Caps Lock


I'd preferred the simplest solution possible. Can I just change some system settings instead of installing a software to solve this problem?
I already use PuntoSwitcher which does the trick but it has some annoying bugs and it's  only useful for russian-speaking users because UI is only in russian. That's why I want to find an alternative.

The main purpose of PuntoSwitcher is to fixe words typed with wrong keyboard layout. For example:


руддщ → hello
ghbdtn → привет 


So it may be useful for somebody who uses russian a lot (outsourcing managers, people who learn russian, etc).