In a single day I can go from box blade, to brush hog, to drag, to arena conditioning tool, to disc without much trouble or fuss. I just back the tractor up to the implement in a low gear, hook the lower part of the 3 pt first, then the PTO shaft (if there is one), and then the top link. Once everything is secure, I'll move to the concrete aisle of the barn to make sure the anti-sway is even and the implement level. Doesn't take much time at all.
If I'm hooking up something big and heavy, like the disc or rotary cutter, I'll back up to where I think I need to be and drop the front end loader, toothbar first, into the ground. If I need to move forward or back a hair, I just use the front end loader to ease that inch or two. Most times, I don't have to worry about it.
I've gotten pretty good at eyeballin' where the tractor needs to be in relation with the implement. I usually don't even use the extendable lower links.
Of course, now that I've said that I'll be cursed with never getting an implement on easily again.