1) Since I have about 80 GBs of music, I take it I want to make a special folder in iTunes for what I want on my phone and sync it manually.
You know what’s not so great about touchscreens? “Virtual buttons.” Personally I still just use my iPod Classic; it’s got a much bigger capacity and I don’t have to look at it just to pause or skip a song.
Anyways, to answer your question, what you want to do is make playlists and “Sync only selected playlists.”
**2) It seems every site- Youtube, Yelp, Ebay has an “app”. Is there any real advantage to using their apps as opposed to just a web browser? The three apps I decide I really want are Sky Chart for looking at the night sky, Mobilinc for controlling my home lighting, and Google Maps since the Apple offering is so horrible. **
Dedicated apps are generally more efficient than using the web browser. Mobile versions of web pages universally suck, while the dedicated apps are (hopefully) optimized for use on the smaller screen.
3) How fast does it burn through data to use Google Maps, say to have the aerial imagery active while riding in a car or on a bicycle? Is data usage an issue if you’re not watching Netflix all day?
Google maps can use a ton of data depending on how much it needs to reload, but you can cache maps and use them offline. Also, satellite view will use a lot more data, for obvious reasons. GPS does not use data, and can be used with saved offline maps, but it will eat up your battery, so use judiciously.
Streaming audio and video will burn up massive amounts of data extremely fast. When you are connected to wi-fi it does not count against your data, so you want to be on wi-fi whenever possible. If you’re just checking your email and looking at a few web pages every day, you won’t use very much data at all. I use my phone that way, I’ve got a 200MB/month plan, which is not a lot, and I’ve never gotten close to using it all. You’ll use a lot of data at first, just playing around with it, but after a few months you’ll learn what’s actually useful and what’s not and your data usage will plateau.