Cusco's advice is spot on.
Just about everytime I land away from my own strip, I am landing on something fairly short..... claypans mostly. There are a few techniques that I have learnt over the years, but would take a small book to write them up. Hopefully you will be using a Cessna 172 or similiar. Very forgiving and yet very manageable a low speeds.
Apart from the landing surface (we don't have too many lush green pastures here) the hazards which can hamper your approach are of utmost importance. Power lines, antennas, some trees can be invisible until you are just about upon them. Have a good look around on the ground if possible beforehand as suggested. Obviously if it is regularly used as a strip then the hazards may not be a problem, but if it is just someones paddock then have a god hard look.
Its great fun and you really get to hone your skills, and get to know the planes performance.
Good luck and have fun