>>22767I like having a frying pan, if you make pancakes in the morning you can eat extras as a quick lunch on the trail!
I love having a water filter, I like the MSR Hyperflow but some people find it difficult to use. You can use tablets to treat water, though, so this isn't something you need immediately.
I find the more I go, the more I see gear I want/need. As long as you have the basics covered, you can figure it out as you go!