takes practice, when i first got my car i really didnt know how to drive stick at all so i watched my friends who already had their mustangs for a while, its all about timing, if you have a stock shifter shifting is gonna be more of a bitch too because those things feel like a stick in the sand, first if u dont have a short throw shifter get one. but pretty much when i drive if im racing or just beating on my car once my foot is planted to the floor on the gas pedal it doesnt come up, you just have to tap the clutch very lightly, just enough so it engages but without your engine revving. its just a feel you have to get, eventually you will get it, everyone misses a gear once in a while, it happens to the best of us, theres no way around it and if people tell you they have never missed a gear then they dont beat on there car or race it or have any fun in it.