Kingdoms of Amalur - Trainers
Trainers in Kingdoms of Amalur will provide you with a permanent increase to whatever skill it is that they train. However depending on what type of trainer you're going to they may not or may only be able to train your skill level if it is over a certain point. There are three different types of trainers, Basic Trainers which handle (1 - 3), Advanced Trainer which handles (4 - 7) and a Master Trainer which handles (7 - 9).
No matter what level trainer you go to each trainer can only give you a single point in each skill. There are however usually two or three trainers per skill that you're trying to raise, visiting all of them will get you through that skill rank without a problem. If you are past a certain skill rank and run into a Basic Trainer it is common amongst players to then visit a Fateweaver, to De-level, train at the basic trainer and any others out there before Re-leveling their abilities.
Kingdoms of Amalur Trainer Locations
Stealth Basic - Star Camp
Mercantile Basic - Star Camp
Persuasion Basic Trainer - House of Ballads
Detect Hidden Trainer - Gorhart Inn
Blacksmithing Trainer - Shieldring Keep
Dispelling Trainer - Adessa
Alchemy Basic Trainer - Ysa (Jakasen)
Alchemy Basic Trainer - Emaire
Alchemy Advanced Trainer - Rathir
Blacksmithing Basic Trainer - Ysa (Holte Flenn)
Blacksmithing Advanced Trainer - Mel Senshir (Ragna Senn)
Sagecrafting Basic Trainer - Ysa (Need Delving Hall keyfrom Scholia Arcana Embassy)
Sagecrafting Basic Trainer - Ysa
Sagecrafting Advanced Trainer - Rathir
Lockpicking Basic Trainer - Southeast Lorca Rane
Lockpicking Basic Trainer - Tiren's Rest
Lockpicking Advanced Trainer - Seawatch (right outside) - Elya Madmyr
Dispelling Advanced Trainer - Rathir
Dispelling Basic Trainer - Ysa
Dispelling Master Trainer - House of Sorrows
Merantile Advanced Trainer - Moon Camp
Detect Hidden Basic Trainer - Gohart Basic Trainer
Detect Hidden Basic Trainer - Ysa (Ambassador Odvar)
Persuasion Basic Trainer - House of Ballads
Persuasion Basic Trainer - Rathir
Persuasion Advanced Trainer - Forum, The Isles, Adessa
Stealth Basic Trainer - Star Camp
Stealth Basic Trainer - Moon Camp
Kingdoms of Amalur Backpack Upgrade Locations
Ysa - Riona Helt in Asker's Alley
Gorhart - Corner Stop (Rikka Egest)
Adessa - Senecer Macit in Domus Polfitica
Mel Senshir - Illyn Doldran
Rathir - Scholia Arcana, (Tywili Coast)