Firemaking

 Firemaking is one of the most useless skills in the eyes of the Runescape community. But it is a very quick 99 to get.

Fire
Right click the log and choose "light" and watch your character how he makes a fire. It will last a while before the log lights, but this will go faster when you get a higher firemaking level. There will appear ashes on the ground when your fire is burned out. The time that the fire burns is depending on the type of log. This method is faster but less exp per log than using bonfires.

Bonfires
You can train Firemaking by adding logs to any existing fire, you will also get more xp per log with this method. You will also get extra lifepoints for an amount of time and there will appear fire spirits, which will give an amount of charms as a reward.

You will get a temporarily life point boost when you use 5 logs on a bonfire. The amount of hp and duration of the buff is determined by the type of log and your firemaking skill level.