The folks at Peak Candle Supplies have made this wonderful candle-making site full of great project ideas, tutorials and inspiration. Projects are well-explained including material selection with a focus on making economical choices for resale.

Taper Candle Making Crafty Tip
Don't waste your scent oils by using them when making taper candles. Tapers, by their very nature and design, are not good at throwing scent and therefore are most economically made scent-free.