www.nano-tuners.com

There are tons of nano mods there, and they cover just about every single nano known to man.

On most SW systems you need a skimmer. They are hard to find that actually work well on small systems. I would research nano skimmers on multiple forums and get a feel for what seems to work well. That being said, on a small tank as such, you will need to change your water frequently to keep your levels at an optimal level. I highly recommend purchasing a floating hydrometer, and/or a refractometer. They measure salinity, in which accuracy is crucial, especially in a nano tank. You want to make sure that the new water is the same PH, temp, and salinity prior to adding it to your tank. Reason being that 14 gallons is relatively small, so any change could cause a drastic change in a tank that size. I tell everyone to go as big as they can afford. I would start off with live rock from and established system, and some dry sand from a local fish store (LFS). This way the critters from the rock will liven up your sand naturally, and the sand will not have any die off like bags of "live sand" tend to have. If you have about 1-2 lbs of rock per gallon in your tank, and a small bioload, the tank will pretty much self sustain without the need for a skimmer. If you go skimmerless though, you MUST keep up with your water changes to keep unwanted nuisance algaes from taking over the tank. This is why people tell you to go slow! Every change or addition in a tank can be considered a major one. A good place to plan a fish list is on www.liveaquaria.com They have a section just for nano fish. I would recommend a shrimp/goby combo for a tank that size. Good luck and welcome.
Oh, once you learn how to use the search feature here, it's on!