(Note: I'm assuming this is all around Allanak)
1. Dung-collecting. This one is great for a noob PC, if nobody else is competing with you. Minimal risk. Hunger/thirst status decline minimally. Payoff is decent for the amount of time and risk involved.
2. Clay-digging. I wouldn't ever do this with a noob PC. The risk of running into a tarantula that will instagib you is just too high. They don't spawn nearby, but they get kited (unintentionally, I presume) nearby all the time. Payoff isn't that great. Hunger/thirst go down quite a bit. Totally not worth it around Allanak, in my opinion.
3. Salting. Haven't done it much since the changes. It seems really difficult to find salt even when your foraging skill is at (journeyman). Also, the payoff isn't anywhere near what it once was, now that the herbalist doesn't buy components.
4. Foraging stones. If your foraging skill is decent, you know where to look, and nobody is competing with you, you can make a decent amount of 'sid per reboot on raw gemstones. More, if there's an active jeweler PC. Much more if -you- are a jeweler PC.
5. Obsidian mining. My go-to once my foraging skill is up, and I can ride well enough to remount and flee. If you don't fart around, it will pay the bills. If you spend a lot of time emoting and draining your thirst meter, though, it's significantly less useful.
6. Glass mining. Great payoff once your foraging skill is up and the risk of instagib tarantula death is low. However, once you're that much of a badass, you probably don't -need- to mine glass anymore...you're just being lazy.
7. Food foraging. Great for a noob ranger or food-foraging subclass. You rarely have competition for it, and the wide variety and cooked/uncooked variants mean you almost never max out the shop.
1. The clay pits need a "hangout," with cheap food, reasonably-priced water, and a quit-safe room. (If they have this already, my bad.) This way you'd only have to run the scrab/spider gauntlet every once in a while.
2. Implement an active-foraging system where you don't have to/can't "spam" commands for this basic stuff. You should be able to type "use pickaxe obsidian" once, and just continually mine it, with chunks breaking off periodically and your stamina draining appropriately. Set an automatic cutoff so that when the PC hits the "very tired" mark, it stops and you have to force it to continue. Same with all of the other jobs. As a noob PC where every 'sid counts, it is far too tempting to ride out to a deposit, spam the command until tired, and ride back in as quickly as possible, to avoid depleting your thirst meter. Timing should be roughly 40 stamina per IC hour...so with a little gear, the average human would be completely exhausted by grebbing from dawn until high sun.
3. Granted, I haven't played with it much recently, and people were complaining vociferously about it, but I still kinda think salting should be de-nerfed. I don't ever recall making vast amounts of 'sid from it, except with magickers.