One really awesome trick I learned is to not form your statement into a question when it is time to do something that isn't a choice. For example if you say, "Do you want to eat breakfast?", you'll pretty much always get a "NO." But if you say, "It's time for breakfast," you might get a much different reaction. Along the same lines, I never realized how MUCH I say "OK?" at the end of every sentence until I really stopped and listened to myself.... like "it's time to clean up, okay?" Well duh, I just gave her the option to say no (and she took it!)
About the clothing issue... My daughter was 2 last June and went through a HUGE phase of not ever wanting to get dressed. She would stay in her pj's all day every day if we let her! She goes to child care two days a week, and would scream, fight, cry, take her clothes off, etc when it was time to get dressed. So after months of trying every trick I could think of, I bought her a couple of comfy outfits that she could wear to bed AND to school, and then her favorite PJ's "disappeared" on school nights, so she HAD to choose comfy clothes to wear to bed. A few months of not fighting over getting dressed early in the morning has saved so many mornings of tantrums and being late. And now getting dressed is rarely an issue.
You just have to remember to foster her independence in ways that make both of you happy, and let her have lots of opportunities to make choices (even choices that you have "manipulated," so to speak.) And I think it's also important to remember that it takes 2 year olds longer to process what we're saying, so if you give her "warnings" ("its time for a diaper change in 2 minutes"), then she'll have time to really be okay with you making a decision for her.
I remember how hard it was to have a really independent 2 year old while pregnant. It sounds like you are really reasonable and willing to let her be a 2 year old, so there's half the battle right there! :) Good luck and congratulations!