Go to Port Sarim, west of Draynor village, and ask one of the people in the blue uniforms to go to Karamja and pay them 30 GP. When you get there, walk off the dock and you should see a house. Enter the house and talk to a man named Luthas. He will ask you to pick bananas. Answer "Yes", pick bananas, put them in the crate, then talk to Luthas to collect your moderately earned 30 GP. If you would like more money in multiples of 30, ask him to get another 30 GP for doing the job again. Stay here for a long time if you need to spend several thousand on items. Go to Port Sarim and do the banana thing and put a bottle of rum in the crate then go in and collect your GP. Then go back outside and to Port Sarim get a white apron and go get a job in the grocery store at Sarim. Search the crate in the back and take the rum and some bananas. Then go to the bar in Sarim, give the drunk the rum and then, when you are done, go up to varrock or someplace and sell the bananas.
Once you are at level 40 mining, add a person named yodoo86 to your list. He always buys coal. Mine coal and sell to him for 100 GP.
Get your smithing and mining levels up to 40 and mine gold in the Lessers Pits on Karajama Island. However, be careful of the level 21 skeletons. There are five rocks, so on a good night when no one is on, you can hit them in a row making your trip very easy. You can usually get 25 gold ore that becomes 25 gold bars. Put them into certs and sell for 1k a gold cert.
Mine and smith until you are at level 20 at both. Make Bronze Bars and turn them into things at an Anvil such as: a 2-H, Mail Plate Body, Skirt, or Kite Shield and sell them at the market for good prices. You can also do this with Mithril, Runite (not Rune), Adamantite, Iron, and Steel.
Go to the house outside of Lumbridge and collect Iron Daggers on World 13. Also, defeat Goblins for items that can be sold or gold, which is common. Sell the daggers for 14 gold or less at the market.
Get your mining level up to 30. Mine coal and you can make them into certificates and trade them for 1,000 GP each.
Get your mining level to at least 15, and your smithing level to at least 30. Go to the mine south of Falador. Mine lots of iron, and take it to Falador Furnace. Go north of Falador to Doric's Anvils. Smith Iron Square Shields and Iron Kite Shields. Take them to the shield shop in Falador and sell them for fast and easy money.
First, go to the new area in south-east Varrock where you buy priest robes. Make sum1 follow you there. There is a pen of rats. Click on attack rats and you will go through a fence. The person following you will be there with you. Log out then, go on a different world and there is a man in a building by the pen. Make sure no1 attacks him, click on attack him and you will get out of the fenced area. Then log out and log in the world that the person that was following you on, and ask them if they want out of the pen. They will say yes, and you say "if u pay me i will get u out". Of course, they will pay. Using this method you will have a lot of money soon, just make sure that a person will pay big or rune armor or sumn like that.
Go to the wilderness. If you walk around, eventually you will find items from other peoples deaths. You shouldn't bring anything good out and stay away from monsters. if you log out while fighting you will die. Run away for a while and then log out.
When you begin smithing a particular type of metal, smith Daggers at first and sell most or all of them. Then, once you get your smithing level high enough to make Short Swords, create as many of them as possible then sell as many of them as possible at the Varrock Sword Shop. They give you the best value per bar. It is possible to make over 1500 gp by selling Steel Short swords. It is also a good idea to allow the swords to regenerate after each sale because you can then get the most possible money for each of them.
Go to Chaos Temple. Kill monks and take the Steel Maces. Sell them to the Mace Store in Falador f
make bronze two handed and large helms and items until you can make Bronze Chest Plates. Make those until your smithing is level 34, then repeat the steps for about 10,000 gp every five to ten minutes.
When at combat level 10 or 11, kill level 18 warriors in Alcarid. They drop money and Iron Daggers sometimes.
Go to Karamja Isle and to where the people fish. Poeple will fish lobsters and swordfish until they cannot carry anymore. They will drop the fish. Take lots of lobsters and swordfish. You can make these into Certs in Draynor, and sell Swordie Certs for 2,000 gp.
There are about seven spawn points for coins. In the wilderness, go to the Dark Warrior's castle and kill them until you get the Rare Black Mace and Black Medium Helmet, which both sell for a lot of gp. Get your crafting up to level 40 and make all kinds of jewelry, which also sell for a lot of money. Make Strength Potions and sell them by the wilderness in Varrock for 1,000 gp. Also make food and sell by the wilderness.
Get your magic level up to 55 (high level alchemy) and buy a Runeite Medium, for 8,000 to 10,000 gp. Use it on the Runeite Medium to get 18,000 gp. Buy another Runeite Medium and repeat those steps to get easy money. Note: This spell uses 5 Fire Runes and 1 Nature Rune.