Spoiler
These are some spells that have low magicka cost and can be bought off the shelf from sellers of spells in the major towns. None require customized spellmaking, but you can do that too if you want.
The trick is that you can cast touch and target spells whether or not you are in a fight; the game still recognizes that you are improving your skill when the spell is cast. From a gaming perspective, my strategy is to buy a spell that doesn't use a lot of magicka to cast so as to train your skill at your convenience rather than only during battle and maximize the number of times you can cast that spell before depleting your magicka reserve. In practice, before I sleep I repeatedly cast a spell till I'm out of magicka. If you have a magicka regen mod installed, then you can do this more frequently. And if you have the Atronach birth sign, then camp out in front of a shrine or healing altar.
ALTERATION
Fenrick's Doorjam (1 pt)
Water Breathing (5 pts)
CONJURATION
Blessed Touch (5 pts)
Bound _______ (6 pts)
DESTRUCTION
Fuddle (4 pts)
ILLUSION
Frenzying Touch (3 pts)
Father's Hand (5 pts)
Night Eye (6 pts)
MYSTICISM
Purge Magic (2 pts)
Righteousness (4 pts)
RESTORATION
Heal Companion (3 pts)
Mother's Kiss (4 pts)
The trick is that you can cast touch and target spells whether or not you are in a fight; the game still recognizes that you are improving your skill when the spell is cast. From a gaming perspective, my strategy is to buy a spell that doesn't use a lot of magicka to cast so as to train your skill at your convenience rather than only during battle and maximize the number of times you can cast that spell before depleting your magicka reserve. In practice, before I sleep I repeatedly cast a spell till I'm out of magicka. If you have a magicka regen mod installed, then you can do this more frequently. And if you have the Atronach birth sign, then camp out in front of a shrine or healing altar.
ALTERATION
Fenrick's Doorjam (1 pt)
Water Breathing (5 pts)
CONJURATION
Blessed Touch (5 pts)
Bound _______ (6 pts)
DESTRUCTION
Fuddle (4 pts)
ILLUSION
Frenzying Touch (3 pts)
Father's Hand (5 pts)
Night Eye (6 pts)
MYSTICISM
Purge Magic (2 pts)
Righteousness (4 pts)
RESTORATION
Heal Companion (3 pts)
Mother's Kiss (4 pts)