Automatically make your character a level 10 with 45 skill points and 500,000 gold.
Besides the regular skills you can increase, you can use skill points to distribute through a skill tree.
Hire mercenaries and re-allocate their skill points to your other units.
In Varock, kill the guards and get skill points and money.
The more skill points you have the more spells you can cast each time you charge your wand so to get the most out of being a witch or warlock - raise those skills, make some friends then get to work.