Through elemental correpondences, colors, materials etc. which You can encorporate in Your spells, rituals , offerings etc. Primroses and Cowslips attract many Elemnetals and Fae.
Sylphs can also be caled by whistle for example, or whirling a piece of hollow Oak wood on yellow twine.
Here You can find some very good info on this:
http://www.spelwerx.com/elemental_correspondences.html , remove spaces of course
And I suggest Cunningham's books : Earth magick, and Earth, Air, Fire, Water for more information about elements and therfore elemntals as well as inspiration on how to work with them.
Cass Eason has brilliant info on this throughout some of her books as well, dealing with Elemntal beings in particular
Also "Encyclopedia of Spirits" By Judika Illes, has most of elemnetals dealt individually with, given their separate propriatory entry and all
Sorry for spelling, was typing fast
Hope it helps, many Blessings