Cannot focus to save my life with this lens... please help!!!
Depends on what you're shooting...
If regular landscape then tighten your aperture up...get it up around f10 or smaller...focus at maybe 6-feet. Images should be pretty sharp with that. Don't let your shutter speed drop too low in chasing a deep dof...for tack-sharp images raise the ISO or use a tripod so your ss doesn't get down too low.
At 14mm, f10, mounted on a crop camera and focusing at 6' according to http://www.dofmaster.com/dofjs.html then everything from 2.16' to infinity should be in focus.