The skills rules are pretty much the same as the magic except for the usage allotted each day. That doesn't exist here. To level each skill up, you must use it at least 15. Upon mastering a level, you get $100 x 15 for every level mastered. If the skill cost you $200, then you get $200 x 15 for each level mastered and so on. You can stack two of the same skills. The OOC string is the same for all of them. 

 

[Level 1 | Dodge | 0/15 | Level 1 | Elusion | 0/15]

[Level 2 | Dodge | 0/15 | Level 2 | Elusion | 0/15]

...and so on.