What you will need
Okay, so you are going to need all of the following, a deck, griptape, wheels, bearings, trucks, and hardware. To assemble it you will need a weanch (adjustable) a razerblade (or a box cutter) and a screwdriver (standard size).
Putting the grip tape on
So the first step to putting your skateboard together is putting the griptape on. I'm not going to get into too much detail with this bacause a very detailed guide can be found if you follow the link below.
messageboard/showthread.php?t=26718
Now that your griptape is on, you want to poke holes in the grip tape so that you can put your trucks on. To so this take your screwdriver and push from the bottem.
Putting your trucks on
Okay, to put your trucks on you are going to need to put your hardware through the holes and then place your trucks on. You will need to tighten the bolt with the screwdriver wile holding the wrench (adjustable) on the nut. Make sure that you screw them on tight, if you don't, the first week you skate your board, the trucks will come loose and you will need to tighten them to the board. NOTE: if you are using risers, put the risers on inbetween the deck and the truck.
Putting the bearings on
To put your bearings on, you will need to put one bearing on upside down on the truck like shown in the picture. 
Now you will place your wheel on top of the bearing and push down. NOTE: you might need to push really hard due to the hardness of your wheel. You will need 2 bearings in each wheel. To put the bearings in, you just flip the wheel over and repete the process.
Attaching your wheels
Now that your bearings are in, you will want to put your wheels on. For this you will need a wrench. Just put your wheel on and tighten. A good tip is to tighten your wheel untill it wont spin and then loosen it a quater turn. Make sure it is on tight though because if not, it will fall off (it has happened to me).
Now you should have a fully assembled skateboard. Watch a skate video to get hyped up and then GO SKATE.
