type ::portal and end up here
now walk over to the "Wise old man" and use the portal.. this will take you to the "members" area
now that your in the members area walk west until you get to this chest
click on it and receive Attack xp...its very fast for 99
Now just a little north until you see a hay bale...search it and receive Defence xp..this is also very fast for 99
Now just east and click on the chaos altar and this will give you Prayer xp..this again is also very fast for 99
Now if you want you can pull this lever for Strength xp, but the xp is not as rewarding
I suggest getting 99 strength while getting 99 hp
Good Luck getting your 99's =P!