Welcome to the fishroom TCC. Have a look at Paul's site, it is full of information for the NZ aquatic plant lover. He also checks in here regularly to offer help and advice...
http://paul.aaquaria.com
The thing to remember is that different plants need to be planted differently to ensure their survival. Some need to be well buried in the substrate whereas others like to have the tops of their bulbs exposed.
You also need to know the plant's general requirements. A lot of people think you can go buy any plant that takes your fancy, put it in the tank, and it will grow. Unfortunately, this is not so as plants have different pH and lighting requirements among other things.
A little liquid fertiliser helps too. Getting the plants established and their roots holding the gravel can be helpful before adding fish.
What size is the tank and what were you thinking of putting in it - plant and fish-wise?