Submissive wife,
A few words if I might:

1) the real key is like Ozme said, proofing your own work. The best way to do this is how we do it normally. Use your ear. Re-read your work outloud and if it sounds funny or strange, then there is something wrong. All the puncuations mean something, like commas or appostrophies; remember to use the proper puncation for the situation.

2) Having someone else go through and correct mistakes can be a bit irratiting (at least to me, but I'm a perfectionist... what do I know). I would, however, go to your local community college and pick up this book "Keys For Writers, By Anna Raimes, copyright 2005 Fourth Edition". You can also get this online as well through Amazon.com. Also, if your not aware of how colleges work with books, they have contracts with the publishers to buy the newest edition books, even when there was almost nothing changed. It's a scam, but what can ya do.

3) You might even think about taking a grammar course at your local community college. Most people don't really know anything about languages least of all the one that they speak. For instance, most people know what a noun is, but could they tell me what a superlative is? or a possive article? Probably not. Colleges today are offering many online courses, and if you are truly interested in improving, supplying structure to it might be a good thing. Thats what I do for my subbie, but that's cause we both need order to understand things.

4) Enjoy your writing. These are you most personal thoughts because they come from you. They show your creativity, your beauty, your elegance and most of all who you are through the emotions you create when you right.

I offer all of this advice in-part or in-whole. I have been requested to tutor in our campus' writing center for multiple terms, but I'm not an english major, I'm a physics major... so that's all a bit superfluous to my already budding career.

Enjoy!