Apps!

I'm making the jump today to an iPhone 5 (and yes I know the new iPhone is coming out in like 3 weeks, but I decided I would rather pay $500 on Craigslist for a new in-the-box 32 GB iPhone 5 than over $800 with tax in a few weeks for the new one) and I'd like to hear some good app recommendations. It's been years since I've had an iPhone; I had a Galaxy Nexus for 2 1/2 years and I've actually been without a phone at all for a few months. IOS is at least familiar to me since I've been using an iPad mini for about 6 months now.

I know there have been some posts like this, but does anyone have any ideas to start me off slowly? I'm a graduate student in the humanities and am always looking for good reminder/calendar applications since I'm a disorganized mess, and I generally use Evernote for my notetaking. I need some suggestions to help me get more organized. I know there are some good library-catalog searching apps out there now, and I don't know if this is a good place to ask, but maybe a few of you are in the same boat as I am and have some suggestions.

Any help is welcome!