user9849: I analyze my tournament games with my chess coach on the computer and in the end I have a PGN file which contains all the variations, mistakes, and tactics i missed. The question is am i suppose to play the game all over again on the board trying all the variations etc, or just studying them on the computer screen enough? 

user12540: It is always a good habit of moving pieces over the board. The best players in the world practice it, and they also recommend it. Sometimes, I can understand that in a busy world you may not have the time and space to occupy yourself and arrange the pieces OTB. 
As far as games are concerned, it depends whether you are learning a specific opening or a variation, then it always useful that you practice your winning games or the games where you have learnt a lot. GM Igor Smirnov says that before you play a tournament, you must have a look into your own games where you had a good win. It not only exuberates your confidence but gives you a strong determination to win the game. Kasparov also says that you must memorize some of the games related to a specific opening which you play. It helps you to remember patterns and best moves in a particular opening.

user10233: I agree that moving the physical pieces impresses upon the mind more thoroughly than by electronic means. We think and conceptualize in 3 dimensions, so it is only beneficial you should learn and study in the same manner. I know I get much more out of reviewing master games on a physical set than pumping through them on my computer in ChessBase. It takes longer, but it's not a race.
The wrong thing would be to think you learned everything from that one session and file the analysis away. Come back and review it frequently and you will make more discoveries.

9849: <p>I analyze my tournament games with my chess coach on the computer and in the end I have a PGN file which contains all the variations, mistakes, and tactics i missed. The question is am i suppose to play the game all over again on the board trying all the variations etc, or just studying them on the computer screen enough? </p>
 12540: <p>It is always a good habit of moving pieces over the board. The best players in the world practice it, and they also recommend it. Sometimes, I can understand that in a busy world you may not have the time and space to occupy yourself and arrange the pieces OTB. </p>

<p>As far as games are concerned, it depends whether you are learning a specific opening or a variation, then it always useful that you practice your winning games or the games where you have learnt a lot. GM Igor Smirnov says that before you play a tournament, you must have a look into your own games where you had a good win. It not only exuberates your confidence but gives you a strong determination to win the game. Kasparov also says that you must memorize some of the games related to a specific opening which you play. It helps you to remember patterns and best moves in a particular opening.</p>
 10233: <p>I agree that moving the physical pieces impresses upon the mind more thoroughly than by electronic means. We think and conceptualize in 3 dimensions, so it is only beneficial you should learn and study in the same manner. I know I get much more out of reviewing master games on a physical set than pumping through them on my computer in ChessBase. It takes longer, but it's not a race.</p>

<p>The wrong thing would be to think you learned everything from that one session and file the analysis away. Come back and review it frequently and you will make more discoveries.</p>
