well many spells work, so long as you know what real spiritual magick can and can't do. magick is energy found in nature. a spell takes this energy and focuses it to create changes in ones life. since this is energy, it deals more with forces than physical change. there are things like beauty spells or weight loss/gain spells that do work, but they are to be used in conjunction with eating right, exercise, and a daily beauty routine.
healing, love, luck, wealth, job, protection, banishing, curses, hexes, conjuring, cleansing and other similar spells can and do work, provided you charge enough energy, focus/visualize the effects, then work to achieve the goal. while the items used to effect the spells outcome, the caster plays a major part.
spells that claim the impossible suck as flying, transformation, teleportation, levitation, invisibility and so forth do not work because magick works within the confines of nature. if a human isn't able to do something naturally [like grow wings or a tail] then a spell won't work.
if you're going with spells on here, i would avoid the Fantasy and Trick spell sections until you have a better understanding of what magick can and can't do. while some spells in these sections can and do work, they're the spells that call upon these creatures [like angels, demons, dragons, faeries] for protection, or to help in a wealth or love spell, similar to how someone would call upon a deity.