There is usually a diagram on the back of the fuse box cover.
As stated, tell us what circuit is not working and someone can probably look it up.
You could just pull the fuses one at a time until you find the blown one. Remember to remove and replace one at a time, dont end up with all the fuses in your hand and no idea which one goes where!
If the fuse blows again, stop and find out why. Dont be tempted to replace it with a bigger amp fuse.
vaux, November 2009