The Dragon 35

Dragon issue 35 was released in March of 1980. It contained the following articles related to the Forgotten Realms:

Leomund's Tiny Hut: Experience: by Learning and Doing

 * By Lenard Lakofka. p. 16

Advice on having characters do things to 'earn' their levels, as opposed to the GP=XP formula. Also talks about training costs and times for leveling up.