Stay on Task
This is another area I have already discussed--back on Day 9 when I talked about . So far, I have found that Remember The Milk, or RTM for short, does the trick for me. There are a variety of great options, though, like Bento, or Things, or Taska.
I have Bento, and I like it, but I don't prefer it over RTM. I will take a look at Things and Taska and see how they compare.
Finances
I like Quicken. I have used every version of Quicken since Quicken '99 at least. On my PC, I track my personal finances, and my business finances in Quicken. I do my invoicing and accounts receivable tracking in Quicken. Guess what? There is no Quicken app for iOS.