Using standard D tuning on your guitar is pretty simple, as far as alternate tunings go.
All you’re doing there is dropping each string by a whole tone down from standard E. D tuning is a favorite in a lot of different musical genres, and it really does sound great, both for electric guitar and acoustic guitar.
Standard D Tuning:
Here are the actual notes you need to tune to for standard D tuning: D G C F A D
This is also a starting point for other alternate tunings, such as drop C tuning.
So, without further ado, watch the RiffNinja explain how to tune your guitar to standard D!