Yo Guyz
Click on the agility skill at skill tabs and choose the Gnome course.
Best way is to complete the parkour,
Per completed round you receive 2 agility tickets wich you can trade
at the agility exchange for XP or equipment.
If you have reached level 35 you can train at the barbarian outpost course
wich gives you more agility tickets and more XP.
The last course is the wilderness course, you need level 55 for it.
That one gives you 6 tickets each completed round and also more XP
then Gnome course and Barbarian outpost course.
After enough rounds you will reach 99 agility