The first phase was:

Dropbox, DocsToGo Premium, iZip - I acquired these to hand a specific situation. They probably aren't critical, but I kept them just in case.

DropBox is very handy, but I'm not sure I'd die without the app. My iPhone use of DropBox is limited to looking up PDFs or Doc files for reference.

DocsToGo then allows me to make simple corrections, or changes.

iZip allowed me to unzip one file, and I've never needed it since. But It is there in case.

I love DropBox, and use it to upload between home and school, but I just find the iPhone uses limited.

My most common use of this combo is dealing with email attachments. I had used this to make notes, but I recently started using Evernote instead. I find that much simpler and quicker. Though I'm still finding the limits of this apps, and trying to see how to maximize its use.

I like Evernote. It beats Apple's note app, and I prefer it over Docs to go for simple notes, that otherwise would get lost in my dropbox folder. I still am learning the ropes though and get frustrated in the differences between the app, website, and windows client. I should have to go to the windows client to make a table for example., but overall I'm liking it.

I still wish it had the ability to edit pdfs, I found a windows program I can use, but that means I can only do this at home. This would be useful because my class notes are PDFs and I would like to annotate them.

But for know I have been organizing notebooks for each class. Then I upload the appropriate PDFs and forward emails, this keeps everything sorted in one place.

Anyone have any great evernote suggestions or other apps I should try?
(I should add I choose evernote, over onenote and simplenote.)