No. 1 thing you should do : fov_desired 90
you can turn off viewmodels and do a lot of other helpful things in the advanced options, like damage numbers, hitsounds/killsounds, etc.
(theres also commands to change these and more)
I would also recommend changing your hud and the default hit numbers are small and red and are very hard to see.
this is a good place to get your cfg : http://www.teamfortress.tv/25328/comanglia-s-config-fps-guide