Spread 2 or 3 inches of compost, peat moss or leaf humus over the planting site, and then till or spade it under to a depth of 8 inches or more. Fertilizing when bulbs are planted is not critical, because embryo flowers initially obtain most of their sustenance from food already stored within the bulbs. If you want to use bonemeal keep in mind that it attracts dogs and rodents, and use accordingly. Depth of planting often depends on bulb size. Big ones such as tulip, daffodil and hyacinth can easily go 6 inches deep and 6 inches apart.
Depth also varies according to soil consistency.
In loose, sandy loam, large bulbs can be set 8 inches deep or more. In heavy clay that has not been properly broken up with organic matter, it is best to go no deeper than 4 inches. Pointed end up is the general rule to follow. If you are dealing with a strangely shaped bulb species that doesn't seem to have a top or bottom, much less a point, just drop it into the hole and let it find its way. Bulbs planted upside down have the uncanny ability to right themselves.