Sally Hanson is a pretty good line...she has a nail shield product that protects the nails...it goes on clear and it's reasonably priced plus you can find it just about anywhere...you should see results in a few weeks. :)
Use Nailtiques nail protein polish. They have different formulas for different nail types and it works wonders. I began using it after my mother-in-law recommended it to me. Once I saw how awesome it is I started recommending it to my friends who now love it as much as I do. Check it out on Amazon and you will see what great reviews it gets. One of the awesome things about it is that it dries almost instantly! Be sure to read all the instructions before use and I promise you will love it. I have used many other products and nothing has worked like Nailtiques. I do have to warn you that it is a little pricey ($10 for .25 oz and $20 for .5 oz) but it's worth it!