Welcome to the iPhone / ipod Touch Club.
There are a ton of great free and not free apps in the store, which can abe a bit addactive at times.
There are a number of ways to find great new apps -
Sites like
App Shopper Which revieew and track changes prices and features in Apps making it easy to find new and discounted apps.
Review Podcasts Like
App Judgement Which review new apps regularly.
Apps like App Sniper on the iPhone / iPod touch, which track new and discounted apps, allow you to set up watch lists for when good but expensive apps are discounted. While not free, the $1 I spent on it has saved me a lot more.