Not a bad attempt, but your diode appears to be in backwards (the cathode needs to go towards the voltage regulator to conduct). The leads on your crystal are also too long (I'm assuming a standard 16MHZ crystal). You want the leads from the crystal to be as close to the pins they connect to as possible and probably on one side of the board. I assume this is only an exercise (i.e. you don't actually plan to make this) as there are a number of things missing to make it a practical usable board and in any case a Promini from ebay for a couple of bucks would likely be a more economical choice.
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