Beginner Clue Scrolls - You can find them from almost all low-level creatures in RuneScape. The easiest ones to kill would be Man and RuneScape gold Woman. There is also the option of killing Goblins or Cows within Lumbridge. Like you've seen, these enemies aren't too difficult at all, so you'll have scrolls to get without any effort. Drop rates for these enemies are about 1 percent. This means you can count on one scroll per 100 kills.
Simple Clue Scrolls - The easiest method of obtaining them is through pickpocketing H.A.M. Members. The drops of scrolls could be in the range of 2%, which means that for every 50 pickpockets, you're likely to get an item. It also suggests the fact that Easy Clue Scrolls might be more accessible than the beginner ones. When pickingpocketing H.A.M. Members, you could be removed and thrown out of their hideout Be sure to wear an H.A.M. set (which you can buy by picking pockets or buying it at Grand Exchange).
This set will reduce the chance of getting exiled from your farming spot while pickpocketing. If you don't have a high enough level of Thieving, or don't want to do this method, then you can also purchase the imbued Ring of Wealth, head to the Edgeville Dungeon, and kill Thugs. They're level 10 monsters and so killing them shouldn't be difficult, even for players who are new to the game. If you have the ring on, you will have a chance to win 1/64 an item drop following each kill.
Medium Clue Scrolls - Although they're named medium, they're more difficult to get than beginner and easy scrolls. The best method of farming Medium Clues is through combat using Ice Warriors. They are discovered in large numbers deep into the northwest Wilderness. They can be easily killed by Dwarf Multicannon and ranged attacks. Remember that traveling to runescape 2007 gold the Wilderness could be a source of danger of Player vs. Battles between the two, so do not bring valuable items.