my two cents on improveing at 40k

[manrogue]

Another thing i'd say is pick your targets wisely and don't get fixated on big shiny things. The reason i like to take landraiders is purely as some people tend to get fixated on trying to pop it rather than hit the vindicator next to it that is wiping more stuff out...
likewise, If you are running a mech heavy list go for the melta units first or you'll soon regret it when they start popping tanks for fun....