I can relate, Brenda! About a week ago, I posted about my shopping frustrations in off topic posts. I am at about 75% return rate too. It's really hard right now for you and for me because we are BUILDING a wardrobe from scratch, rather than filling in cute pieces here and there. That makes for a lot of shopping.
I hope you have good stores to shop at locally. I really think that will help. I think if I had a weekend to shop at Nordies, AT, ATL, Jcrew, Gap, and Boden, I could be done shopping for the most part for the season. I don't though. I have to mail order from these stores...except Gap, try it and return it. I typically order in about 5 or 6 pieces and keep 1 or 2. I am in total agreement with Steph and QM about looking at shopping as trying it out instead of buying. It keeps you from being quite as frustrated. Mail order shopping is SUCH a shot in the dark. Take note of what size fits you well in certain stores...helps a lot.