This is a very informative video for getting started. Mixing by volume, mixing by weight, equipment, online e-juice calculators, etc. The FAQ that was posted above looked good too, but the video will let you know both the pros and cons of the two types of DIY mixing so you can decide for yourself. There are specific reasons to mix by weight and reasons to mix by volume. That said, in the end just choose what looks more appealing to you. There is nothing wrong with preferring one way over the other.