Sid, some particularly handy implements for those little 8N.s are: #1, a 2 bottom, 12", 3 point plow. This is literally the implement, around which that line was first designed, around 1939, and very few if any modern tractors perform better on one of those. When pulling that plow, be sure to have the 3-point hydraulic control (little lever under the seat) in the down, or "draft" position. The plow is probably the only implement that you want to pull in the "draft " position. That position will allow spectacular performance on the plow, and constant depth plowing, over un-even ground contours. 4-wd, a handy feature on most modern tractors, don't help a lot on a 3 point plow, much less than on other implements like a disk. In fact, there is no implement that benefits more than a disk, from 4 WD. Your 8n will not be so hot on a disk, due to its low hp, and light weight. Loading the rear tires will help a lot there, as well as on the plow. For all other 3-point implements, your hydraulic control lever should be in the up, or "position" location. That will hold the lift arms in constant position.
#2, is a 3-point carry-all. The frames for these are available at low cost, and cheaper than you can build them yourself (thank you China), at Tractor Supply store. You can build your own wood box on these and have a very handy implement for moving things around. This is my most-used implement, mainly for hauling firewood.
#3 is a 3-pt scoop. This also is available, relatively cheap at TSC, or used, and also is a very handy implement. I have used mine, in the forward position, to dig several small ponds (up to 1/4 acre in size), and in the rear position for moving soil, stone, wood-chips, manure, shrubs, and trees. The rear position actually works better on a 9n, or 2n, due to their lower speed reverse gear. You will end up with some clutch riding, trying to use that scoop in reverse, on the higher geared 8n. I spent a little time looking for a good deal on a 9n or 2n, just to have a low-geared tractor around for use on the scoop. Eventually I ended up with a nice little Ford 2000 Diesel, and it's (2) reverse gears took care of that problem.
The 8n also has a low hydraulic-lift capacity (Soundguy will tell you all about that), and it was totally useless on the "rear loader" I made, by attaching the scoop top-link, to the #4 implement, which is a "lift-boom" and two lower link extensions made from heavy angle-iron. By itself, the lift-boom (also cheap at TSC), worked real good on that 8n. I dragged many a log out of the woods with a "Northern-Catalog" log tongue, hooked onto the end of that boom.
As for that Lift-boom/Scoop rear loader, It worked great on the 2WD, 2000 (probably had more than double the hydraulic lift capacity as the 8n). I think it actually worked better, on a 2wd tractor, than a front load, because as you loaded it, you actually gained traction on your drive wheels. Unlike the front loader, which I believe is near useless on a 2wd tractor, because you loose traction as you load it. I loaded a lot of horse-manure into a spreader, stone onto a flat-bed trailer, and top-soil into a dump-truck, with that "rear-loader", that I fabricated for less than $300 The only place I like a front loader is on a 4wd tractor, where they are great, and I have often used mine, to pull myself out of mud-holes.
Although quite popular, I would not recommend a bush-hog, or any pto-implement on an 8n. The lack of live hydraulics really hurts you here. The lack of live pto aint that big of deal, being easily compensated for thru the addition of a $75 TSC over-running coupler.