1) There are thousands of contractors on Elance ready to out-bid each other for your Android app. I found a contractor that charges less than $100 per app. This means that I only need 50 sales EVER on my $2.10 apps to make a profit.
2) Take the time to learn all the features when you switch to a new platform. I've been missing out on $1000+ per month because of Google's auto-translate feature.
3) Reach out to other developers as much as possible. For my first 1.5 years in the App Store I was completely on my own. Luckily, now I'm part of a mastermind group with other top app developers.
Note: Although Android apps can be a good diversification, I highly recommend iOS over Android.