Armstrong, Busby, and Carr, A Reader's Hebrew-English Lexicon of the Old Testament. Provides glosses for all words which occur less than 50 times in the Hebrew Bible, verse by verse (similar to Kubo's NT work), except for proper names. Appendix in the back has the >50x words. Hebrew for Reading Comprehension is designed to get students to the point where they can translate with the aid of this tool

William Holladay, A Concise Hebrew and Aramaic Lexicon of the Old Testament. Unlike BDB, it is possible to find words fairly quickly in this lexicon which organizes words alphabetically, not by verbal roots.

Ronald Williams, Hebrew Syntax. Describes the wide variety of usages of those small Hebrew words, including prepositions and particles.

Kyle McCarter, Textual Criticism: Recovering the Text of the Hebrew Bible. A basic but excellent introduction to textual criticism. The table of contents itself provides a great summary. He urges common sense when approaching the topic, and says, "The 'more difficult reading' is not to be preferred when it is garbage" (page 17).