Stats
Strength - Megaton, in Sherriff Lucas Simm's house.
Perception - Republic Of Dave, on a bookshelf on the right in the Museum of Dave.
Endurance - Deathclaw Sanctuary, at the entrance on a table next to a rotting Brahmin corpse.
Charisma - Vault 108, in the Cloning Lab.
Intelligence - Rivet City, on Dr. Li's table in the Science Lab.
Agility - Greener Pastures Disposal, in the small office covered in radiation.
Luck - Arlington Cemetery North, in the basement on a shelf directly below the stairs inside the house to the north.

Skills
Barter - Evergreen Mills, in back of the Market Bazaar on a shelf in the upper-right side behind the Raider Trader that does not attack.
Big Guns - Fort Constantine, in the basement of the CO Quarters inside a safe in the wall.
Energy Weapons - Ravenhold.
Explosives - WKML Broadcast Station, turn on your local map. Go through the doorway to the sealed cistern and find it.
Lockpick - Bethesda Ruins, in Bethesda Offices East on the top floor near the door to the bridge.
Medicine - Vault 101, on your dad's desk when leaving.
Melee Weapons - Dunwich Building, just before you leave the Virulent Underchambers, on the floor next to the door.
Repair - Aerefu, in Evan King's house.
Science - Vault 106, on a table in middle of the living quarters second level main room.
Small Guns - National Guard Depot, go through the training room and offices to exit from a door to the main room. Use the power switch on the wall to your left and enter the Armory door, then search the shelves.
Sneak - Yao Guai Tunnels, on top of a metal box in the Den, on the right of the map near some water.
Speech - Paradise Falls, on a table inside Euology's pad [Slave Master's house].
Unarmed - Rockopolis, go directly west from Casey Smith's garage. Look for tattered banners that are strung up. Use your local map to find it.