A few weeks ago I posted a [post=1603994]list of my favorite self-study resources for Latin[/post], and though I bookmarked it for future reference, I got to thinking it might be more useful as a devoted thread (especially for people who come to the forum looking for such).
So: This is a thread for people to contribute resources to aid in the study of Latin. (Hopefully, if it is useful enough, it will be tagged sticky )
My first advice to those who would study Latin is: Make sure you know English grammar (or whatever your native tongue) before you try to learn Latin. You will never understand the Latin use of participles, gerunds, the pluperfect tense, the subjunctive mood, nor a hundred other constructs if you do not understand those grammatical concepts first in your L1. From my hobnobbing with Latin teachers, I gather this is one of the major hurdles to the language these days.
I did not recognize it at the time, but I now realize that when I first studied Latin, half a lifetime ago in a minor seminary (ie high school), the freshman English curriculum was designed to do just that. (Whether this was in service of the Latin or whether that was just a side-effect of giving the diverse body of incoming students a common ground I cannot say – Only that it worked).
That said, I have not needed to use it myself, but I know there is a book titled English Grammar for Students of Latin. There are also books along the lines of English Grammar for Dummies, or you might consider a community college course or private tutor, if you think you would benefit from such a refresher course.