The skills and their attributes are listed in the Instruction Manual that came with the game. If you didn't get a Manual, they are all listed when you push B then R trigger or L trigger until you get to them.

Skills Agility............Block Agility............Light Armor Agility............Marksman Agility............Sneak Endurance.....Heavy Armor Endurance.....Medium Armor Endurance.....Spear Intelligence....Alchemy Intelligence....Conjuration Intelligence....Enchant Intelligence....Security Personality....Illusion Personality....Mercantile Personality....Speech Craft Speed...........Athletics Speed...........Hand-to-Hand Speed...........Short Blade Speed...........Unarmored Strength........Acrobatics Strength........Armorer Strength........Axe Strength........Blunt Weapon Strength........Long Blade Will Power.....Alteration Will Power.....Destruction Will Power.....Mysticism Will Power.....Restoration Every skill point you earn also provides 2x, 3x, 4x, or 5x multipliers for increasing the skill's controlling attribute when you hit your level-up screen. This is true whether the skill is a major/minor skill or just a miscellaneous skill. It doesn't matter whether you "earn" the skill points through usage in game or whether you pay for training, even for miscellaneous skills. (This changed with patch 1.1--it used to be that if you paid for training misc skills, you would not earn multipliers for that.) The breakdown for how many multipliers you get goes like this: 1-4 skill points = 2x multiplier 5-7 skill points = 3x multiplier 8-9 skill points = 4x multiplier 10 skill points = 5x multiplier Any combination of skills will work, as long as they're all for the same attribute. For example, if you put 5 points into Long Blade and 5 points into Acrobatics, both of which are Strength-based skills, then you'll trigger a level-up and you'll have a 5x multiplier for Strength.