The mind trick is obviously a very useful power for Force users, provided that the recipient is susceptible to it (i.e. "weak-minded"), which makes me curious as to why they don't try to use it more often. Are there certain drawbacks to attempting to use the Jedi mind trick (regardless of whether or not the trick is successful)? For example, would it have something like a draining effect on the power of the Jedi using it and they, therefore, need to avoid trying to use it too much? Or do they refrain from attempting it for entirely different reasons?
This is according to the wookiepeedia. http://starwars.wikia.com/wiki/Mind_trick
"When instructing Jedi students, Yarael Poof stressed that a user must be mindful when utilizing this ability, that their target was nevertheless a living being with lives of their own, and that extra precaution must be exercised as their command could potentially ruin their target's life."
So there seems to be no negative effects on the user, just a strong moral obligation on how they use the power. This of course only applies to Jedi. Sith would have no objections on over using or abusing the power to get the results they wanted