If your Attack Level is 1, there isn’t much of a choice for a weapon. Try an Iron Scimitar. Weak, but fast. Kill some cows North-East of Lumbridge. Drop everything but the Cowhides, because Cowhides are a whole 100 coins. After you get a full load of Cowhides, go back to the Lumberidge Castle, climb the stairs twice and put the Cowhides in your bank.
At Attack Levels 5-10, do the same thing. At Level 5 use a Steel Scimitar. At 10, use a Black Scimitar.
If you are not a member, kill some Monks at the Montastery. Each Monk you kill gives about 50 Experience. If you are low on health, they can heal you.
If you are a member and you are at Attack Level 20, you should get a Mithril Scimitar and this time, go to Pest Control by going to Port Sarim, and get a ride from a Squire.(they are located at the dock above the one on the bottom) After getting a ride, go a lil South, and climb on board the great ship! If you beat the easy game, you earn Pest Points. Going a tiny bit North will bring you to a Void Knight. Exchange with her and buy Attack Experience. Do not buy anything else.
When your Attack Level is 30, you know the drill. Get a Adamant Scimitar and keep training at Pest Control.
At 40 Attack (congrats) get a Rune Sword or Rune Scimitar. Both of ‘em are great. As usual, stay at Pest Control.
When you’re 60 Attack, beat the Lost City quest. You should use a Dragon Longsword or a Dragon Scimitar.
*If you think these guys are too weak, fight some Green Dragons. They are West of Clan Wars. Be sure to bring a Anti Dragon shield as well as about 9 lobsters. But be careful, Green Dragons are around Level 75. To know more info about making money from Green Dragons, go to http://www.wikihow.com/Make-Money-in-RuneScape-with-Green-Dragon-Hide.
At 70 Attack, get your hands on an Abyssal Whip and fight at Pest Control.
If your really at 75 Attack get a GS (God Sword). Since your so strong, you can kill pretty much anything. You can go to the King Black Dragon, most high leveled monsters will do good.

[edit] TipsAlways use an Amulet of Strength or, if your a member, use Amulet of Glory. Both of them will make your attack stronger. Potions are pretty good too, but they are costly. You should only buy ‘em if your rich.
If you want to get Attack Level higher faster, go to Pest Control. If you want money, you can kill other things. Like Chaos Druids, they are around Level 13 and can drop Ranarrs, which are worth like 5k. Chaos druids are easy to kill and have great drops.
You don’t know how to play Pest Control? Well, all you gota do is aboard the ship and go East, South or West. There would be NPC that attack you, kill them. But, when you can attack a Portal, kill it quickly. The object of the game is to destroy the Portals. And to keep the NPC in the middle alive.
NPC= Non-Player Character
If you don’t know where to sell or buy any items, go to the Grand Exchange which is West of Varrock. Talk to the Grand Exchange clerk. If you still don’t know where the Grand Exchange is, check on your map by typing “Grand Exchange”.
http://runescape.com is a game anyone can sign up for.

[edit] WarningsIf your at Pest Control and playing the Mini-Game, DON’T WORRY! If you die, you lose no items. But if your not in the Mini-Game, you can die and lose all of your items. If you fight creaters that are higher leveled than you, be sure to bring food. Be careful and good luck!

Tags: How to Train the Attack Skill in RuneScape