The skill required to make potions is called Herblore. The main method used to raise (or "level") this skill, as with most skills, is using it. In this case, just make a lot of potions. See the related links for more specific suggestions.
Chat with our AI personalities
a few minutes.
You need level 68 fishing to be able to get in the fishing guild, however you can use stat boosting potions/food to get in, making it possible to get in at a lower level. A fishing potion will temporarily boost your fishing level +3, so if you had 65 fishing a drank a fishing potion, you could get in. Also, if you only had 63 fishing, you can eat an Admiral Pie which will temporarily boost your fishing level +5.
No their effects don't stack.
The Blood Pact, Witch's Potion, Farmer ted's quest, and cook's assistant.
to change your stats on runescape all you have to do is level up.