http://vhrguide.silvermyst.co.uk/skills.html (Needs updated a bit)
Breeding skill - breed two cheap horses together and get the foal.
All training skills (you'll probably only need English/Sport/Horsemanship) - Take lessons, then train a cheap horse until the skill gets really hard to gain (around 50 or so I think, lessons will get you to 20)
Ranch Management - Run events
Farrier/Item Crafting - Make items until it get's really slow (probably around 50)
Vet - Study Horse anatomy (again it'll probably get hard around 50)
Then top up with offline points. Make sure you log out when ever you go away.

Have fun.