I bought an iPad & ForeFlight pretty early in my training. I knew I was going to be using it at some point and wanted to get familiar with it. I never used it early on (pre-XC) because there was just no need. On our dual XC's my CFI brought his but I didn't use mine. I primarily used it early on to check TAF's, METAR's, etc...
I did 4 solo XC's - all long one's (3 stops) and I'd fly a leg or two with a map and then fly one with the iPad. Certainly then and even now I don't just turn it on and stare at it. I'll look at it for something (find a reference point, city, airport, whatever...) and turn it off.
I do a pretty thorough pre-flight with the map so I know where stuff is and I just write what I need down, including frequencies, on a piece of paper that I attach to the clip on the yoke. Done. Of course, I fly now with the 430W in the plane and I really don't use a paper chart because of the hassle...so when I need to see the chart, I use the iPad.
I could teach someone all they needed to know in sequential order all that you need to do to complete a NavLog with an electronic E6B in about 10 minutes. There's nothing to it - and it's way faster than the manual version. I have an engineering degree...I've used a slide rule. Work smarter not harder.
I thoroughly enjoy flying out the window...it keeps your head outside and your eyes sharp. You learn distances better and just get better finding stuff when you are practicing. And most importantly, you're always scouting that spot you'll point to if the you know what hits the fan. I'd rather have an eyeball on a spot than have something happen and go digging for an iPad and start dinking around with the 430W to figure out where to go.
My DPE loved talking iPad during my checkride. He could tell I wasn't dependent on it so that probably helped. He let me use it to bring up the weather charts in ForeFlight during the oral. For the XC I used the paper sectional of course. That said, he did let me bring up my iPad on the diversion (not to navigate with it but to look up some info about the airport). We also have a Stratus and he wanted to talk about that as well as he'd never used one. While it's definitely important to know how to do all this stuff without the technology it's not a bad idea to practice a little with it as well before you are out on your own. I wanted to navigate a few legs on my XC's the way I'd do them 'in real life'. That way, if I had any questions I could ask my CFI on our next lesson.
I use LogBook Ten Pro for a digital logbook. I like it a lot and it's nice that you can export your NavLog out of ForeFlight directly into the logbook. You'll have to make a few changes on hours and such (if you fly longer/shorter than what FF anticipated) but I like it alot. It has a nice homescreen that shows your total hours, PIC, instrument, dual, etc... and how many days your still current on landings.
I also found a great W&B app that allowed me to plugin all the data for my plane and even print it out if I want. I also subscribed to the FAR/AIM so that I always have the latest/greatest version on my iPad. That said, I believe FF has at least Parts 61/91 included in the documents section. I bought one with the Verizon connection (which you'll need to have anyway if you want to do GPS with the device - even if you don't activate it, you need that chip in there for GPS to even work) and can get on the web anywhere and check weather, etc... Of course, I have links to DUATS and Weathermeister.com on my main page to check those quickly.