Make regular backups of the contents of your phone

Phones don't last long. And when they die, often their data goes with them. Gizmodo has put together a guide to backing up your phone. It's pretty comprehensive, have a look:
How to Backup Any Smartphone - Gizmodo

give your iPhone better eyes

Let's face it, the iPhone camera lens leaves a lot to be desired, and the zoom feature doesn't give you more, it gives you grainy. Here's one way around it: take a few lenses that are laying around from other devices and repurpose them.
iPhone Magnifying Camera Mod - Instructables

photoshop.com mobile

The Adobe folks have extended photoshop.com to your handheld smartphone. This isn't photoshop-on-your-phone, but it's a pretty nicely featured set of editing functions. All three look to have similar functionality with slightly different shells.

Photoshop.com Mobile - Edit photos, share images, upload