Just to confuse you more and add to the mix :)
Herbalism is a collecting skill. This skill by itself only gives the player the ability/knowledge to be able to find and gather usefull plants. You cannot farm usefull plants without this skill.
Alchemy and Enchanting currently require materials gathered with Herbalism. Thus if you wish to be either an Alchemist or Enchanter you need to know herbalism or have a friend that does.
Skinning is a collecting skill, also. This allows you to skin skinable mobs for light, medium and heavy leather which is used in both Tailoring and Leatherworking. I haven't checked out Blacksmithing so I don't know if you need leather for platemail.
Mining is similiar to Herbalism and Skinning. This is another collection skill. By itself it only allows you to mine ores/metals that you come across. These items cannot be gathered without this skill.
So, basically Fishing, Hebalism, Mining and Skinning are all supporting or base skills for other skills.
Other skills; Alchemy, Blacksmithing, Cooking, Enchanting, Engineering, First Aid, Leatherworking, Lockpicking, Poisons, Tailoring and Survival
Lenari - Priest, Beta Server
Druzzel Ro of EQ
Befallen EQ 2
WoW Khaz Modan