Completed quests that award Smithing experience such as The Knight's Sword, The Giant Dwarf, Elemental Workshop (1 and 2), Heroes Quest, and Pirate Pete subquest for Recipe for Disaster will provide you with enough experience to RuneScape Gold get to the level of 37 for Smithing without having to level by yourself.
Iron Bars needed to complete the Knight's Sword quest can be located on the ground at the Wilderness level 18 to the west of Graveyard of Shadows. If you're using Hardcore and Ultimate Ironman, better make the trusted runescape gold websites iron bars yourself. In the Wilderness is the zone of PvP where you could be assaulted from other gamers.