Meditation is one of the oldest methods of mental focus. It involves rhythmic breathing, mental imaging, and physical posturing.
That is the correct spelling of focused.
Some tips to be and stay focused include clearing all unnecessary distractions...
The omega-3 fatty acids in fish as supposed to help improve your brain function...
F1 and F2 are both foci (plural of focus) of the ellipse. Do the !
Concentrate is another word for focused.