"Lets Learn Hiragana" is possibly the best workbook you can get that covers all the fundamental aspects of basic Japanese writing, and it comes at a price not too heavy on your pocket. If you are thinking of taking up the language then buy a basic self-study course to begin with.
If however you have got a basic self-study kit, then it's probably better for you to head for this book before delving into dictionaries (unless you only plan to speak the language - not write it). The book uses a simple look and copy method, and in between learning every 10 characters or so you have a few exercises to construct/romanize words using the letters you have learned previously in the book.
Besides these two core elements, stroke order for every character learnt is shown along with key grammar points. At the back of the book there are some more exercises and some fun puzzles to work through, including a Japanese wordsearch.
I could not recommend this book more to someone studying Japanese. If you are a school student then you will find this very similar to modular units used in modern language text books, although it is not in colour so it may be dry for some.
Apart from a very few mistakes with Japanese words in the book this is the best on the market.