Some spells require more energy than you might have, one thing you might want to do is try it on a full moon, or close to midnight. Also, i've read you should perform a spell several times before it will work, like once a day for 3 days. Also performing a spell in a Sacred Circle might make it more powerful so you'd see results faster.
You may just need to wait a bit longer to see results.
If that's not the case, then you may just need to bring your energy up.
Little tricks like meditating, writing a spell out in a foreign language, singing, etc, are helpful. Sometimes spells with intense emotion attached get results quicker.
Doing a spell more than once isn't a bad suggestion, but you run the risk of putting out a 'doubtful' energy; actively working against your own spell.
Re: Spells not working
By: WhiteRav3n / Knowledgeable Dec 17, 2011
Post # 4
Not all spells on this site are real. If they sound too good to be true, they probably are. Even if your friend's "worked" it could have been coincidence or he could be lying to not seem like a failure when in fact the spell he/she used was a "fake" spell from a fluffy.
You need to study and practice the basics first.
And raising power is essential for spells.
Read this, and it may help you to understand.