I assume the question refers to RuneScape. You have to:
Fastest means costly, finishing dragon or onyx bolts
Build troops or attack npc
Work your way up to 63 hunter and hunt carnivorous chinchompas until 99 hunter. It's the fastest and easiest way to get 99 hunter and you make a lot of money on the way.
The best way on runescape to get 99 attack is to get 70 def 70+str the higher the better in str and the def is so that you can wear guthans.Then all you have to do is go to bandits and camp there
kill 1000 lvl 5 goblines
Hax and gamesharx! In fact, they're the only way to get 999 or 99 rare candies or master balls.
look at link below, it has wc training for p2p and f2p
If your not cheating, then the fastest way is to buy high level logs and fletch them. Since arrows and bows are sellable you'll be loosing only some of the money.
99
Seriously, the fastest way from level 90-99, is Soul Wars. It takes 2 weeks to get the 1000 points and every 100 points gets you a level.
Keep playing. Try to get more xp by kill and skilling.. BTW its max in 120 level.
Take US-17 South for 99 miles for an estimated 2 hour drive.