there is no easy approach! It all boils down to practice and how well you know your tools. Only then you will find the EASIEST approach. But then it's just a matter of opinion, Your opinion.
characters, props, sceenery ect.... Most people have their own style on how they go about modeling their whatever. There really is no standard way. Which brings me back to the first point.
Practice....
If your just starting out with modeling, Then the best thing you can do is find some simple tutorials that are made to teach you the interface of the program that you are going to be using.
If your using Milkshape, then there is a tutorial that is floating around somewhere called CS girl. I've tried to get my hands on myself but I do not have an account on turbo squid.
If your using Gamespace then the 3d buzz tutorial. which can be found on the 3D BUZZ site or the GS site itself.
As far as max or or maya, I see more of those floating around on the net then anything else.
Their are alot of tutorials on the net, Just do a general search for 3d tutorials or something along those lines and im sure you will find something that suits you.
WindowsXP/SP2, Pentium 4 2.66 GHz, 1GB DDR Ram, Geforce 6600 256MB