How to Make It All Work Together

This year I've come across so many tools that will make teaching easier, but now I have to whittle it down to best choices.  This is the struggle.  Which tools will help the most, with the smallest learning curve for the students and parents?

I think the ones I will use the most this year are:

Twitter (a great way to get info to a group quickly)

Jott (a way to remind myself anywhere of something I'm likely to forget!)

Skitch (a great way to mark graphics up on anything quickly)

Evernote (for organizing notes with searchable text)

Since I have a website already, I don't need drop.io as much, but I think I'll still have some use for it