Enchanted items tend to have diminishing returns. Carrying a dozen four-leaf clovers is about as effective as carrying one, and overloading yourself with wards and protections may have more negative effects--as the magics conflict with each other--than positive outcomes.
To reflect this, a character may only have one active magical item per "slot." Each of these slots covers a specific type of magical protection or enhancement.
Body: This includes armour, clothing, and related items. Enhancements to body-slot items enhance the natural protective qualities of such items, and further ward you from incoming blows. Body-slot items give a bonus to Armor defence.
Chest: This includes broaches, medals, and sashes. Enhancements to chest-slot items calm your emotions and make it easier to keep a level head in periods of stress. Chest-slot items give a bonus to Resolve defence.
Hand: This includes weapons, wands, and other magical items you can hold in your hands. You may have up to two Hand-slot items at once, one for each hand, unless you are wielding a two-handed item. Hand-slot items give a bonus to active skill checks, per each item's description.
Head: This includes earrings, glasses and headbands. Enhancements to head-slot items help you remain cool and composed, even in trying conditions. Head-slot items give a bonus to Composure defence.
Neck: This includes amulets, pendants and medallions. Enhancements to neck-slot items bolster one's faith in oneself, buttressing your spiritual strength. Neck-slot items give a bonus to Willpower defence.
Waist: This includes belts, chains, and buckles. Enhancements to waist-slot items improve your resilience and recovery speed, allowing you to push through debilitating effects such as diseases and toxins. Waist-slot items give a bonus to Endurance defence.
Wrist: This includes bracelets, bracers, watches, and other items worn on the wrist. Enhancements to wrist-slot items increase your manual dexterity and reaction speed, improving your reflexes. Wrist-slot items give a bonus to Dodge defence.