Here is a quick optimization guide showing how to adjust key settings in Counter-Strike Global Operations (GO) for Counter-Strike veterans and new-comers into the CS community. At first glance CS GO just looks like a prettied up Counter-Strike Source version with many of the default maps like De_Dust, De_dust 2, aztec, train, and inferno, most of the guns and gadgets in CS source with a few additional ones, and gameplay tweaked a little. I'm not going to go over strategies, or shooting techniques with this first part and just go over the main things you need to adjust to make CS GO optimized for higher shooting accuracy. There is still a console tab that can be enabled in CS GO by going to Help & Options -> Game settings At the bottom check the Enabled developer Console with the ~ key being the default key to open.
Next go to Keyboard and Mouse Settings. In this settings tab disable mouse acceleration and raw mouse input.By default these are on.
Next go to Game Settings. The first option on this tab allows you to change the crosshair for CS GO. By default it is a dynamic crosshair with a dot in the middle and 4 small lines in the horizontal and vertical position. When burst firing this is just too crazy and will distract your eyes. I suggest setting this to classic, classsic static or static default. Another good crosshair option is just making a small dot in the middle of your screen without any lines - just a dot in the center. This can be accomplished now with commands cl_crosshairdot 1 and cl_crosshairthickness 2 and cl_crosshairscale 0