Thieving

Early levels can be skipped by completing quests that give Thieving experience. Completing Biohazard, Hazeel Cult, Fight Arena, Tower of Life, and Tribal Totem grants a total of 7,200 experience, which will get the player from level 1 to 24. These quests can be easily done at a low level and they have minimal requirements, however some of them involve some sort of combat.

Furthermore, completing The Queen of Thieves, The Giant Dwarf, Death to the Dorgeshuun, The Golem, Creature of Fenkenstrain, Twilight's Promise, Ethically Acquired Antiquities, The Feud, and Death on the Isle grants a total additional 41,500 experience, which will get the player up to level 42.

From level 1 to 45, you can train Thieving in the Chambers of Xeric raid atop Mount Quidamortem in the Kebos Lowlands. Bring a lockpick (can obtain from a Scavenger inside the raid), then reload the raid until the first room is a thieving room. Steal from 4 chests in a circular motion and you can expect experience rates of up to 30,000–50,000 experience an hour. Simply pick the locks until you get the prompt that you can't carry anymore grubs, drop the grubs, then continue picking locks -- do not place the grubs in the trough, as doing so will complete the room and lock you out of further Thieving experience for the rest of the raid. The easiest way to get to the Chambers of Xeric on a fresh account is by taking a minecart to Mount Quidamortem from Port Piscarilius for 20 coins.

Experience rates can be improved by scaling the raid to up to 100 players, which significantly reduces the chest respawn time. In certain room layouts, it’s possible to rotate between just two chests due to the fast respawn rate. Some players position their camera and character in a specific way to allow near-continuous clicking between the two chests without moving, improving both experience per hour and ease of use.

It only requires about one hour of raid time to level from 1-40.

From level 1 to 5, pickpocket men or women around Gielinor. Players who have their respawn point in Lumbridge can do so around Lumbridge Castle and simply die to regain Hitpoints. Alternatively, a man by the Draynor Village Agility Course start can be trapped inside the house so that he will stay in place. Reaching level 5 takes 49 successful pickpockets.

The Sorceress's Garden minigame consists of navigating through a maze while avoiding guardians to pick fruit and squeeze them into juice. A pestle and mortar is used to squeeze the fruit into juice and a beer glass is used to hold the squeezed juice. Beer glasses can be bought from the Grand Exchange, or found by searching the shelves in the Sorceress's house before you teleport into the garden. Only one sq'irk can be obtained per trip through a garden.

To unlock access to the Sorceress’s garden, talk to Osman in front of the palace about sq'irk juice. He is also the one to whom you trade your glasses of sq'irk juice in return for Thieving experience.

Experience rates are unknown for some of the lower level gardens. Sorceress's Summer Garden (requiring 65 Thieving) provides a maximum of 150,000 per hour, however 'realistic' experience rates are closer to 140,000 experience per hour, given the need to bank the sq'irk once inventory is full.