The first part of the project was taking the old fence out. Luckily, all the hard effort and back-breaking that went into this portion was done by my charming bride, cuz I was too busy studying, doing research, and writing reports. Tearing out the fence can be the most difficult part, depending on how determined the fence builder was to keep out rodents.
Next up, digging. And by digging I mean a sweet trench the likes of which have never before graced this particular corner of garden. We're talking a full shovel width and depth for tens of feet in either direction (from the middle), squared up at the bottom, and cleaned out of all the big chunkers.
If you have stout fence posts in place already (because you're going off a previous fence or something), they are a great place to start and end your fence. If not, you need to make such a post. My favorite post setting method is quick and dirty: dig a hole with your post-hole digger (P.h.D) about 1/4 the length of the post (so for a six foot fence, you want a two foot hole and an eight foot post), then throw the post in, pour loose dirt in around the edges and wiggle the post so it gets down to the bottom. When the dirt has filled up the hole, you'll put extra dirt right next to the post and stomp it, hard, repeatedly, and with conviction. When you've added dirt and stomped each side of the post about three times, the thing will be pretty stout.
Now the fence is all nailed, at the perfect height, and ready for anything. You'll probably want to fill the trench in now, but if you have particularly nasty gophers or bermuda grass, consider filling the trench with woodchips or bark mulch or something. Doing this makes it easier to pull out bermuda runners, harder for gophers to find their way into the garden, and saves all that dirt for something useful, like planting beds.
That's all there is to it: rip, dig, post, nail, fill...
Happy fencing