Things we're still struggling with: 1) Knots/tangles/handling of tippet. I'd say the ultra noob among us and my buddy spent nearly half their time fixing crap and the other half fishing. I had a furled leader this time and that made a world of difference. I spent way more time fishing than I have in the past and from what I could tell it didn't hinder my ability to catch fish (always had 2+ ft of tippet on it). 2) Moss. Now that we're down deep enough this is finally becoming a problem. 3) Finding/and/or enticing the fish. I'm sure our drifts aren't perfect, and practice will go a long way to help. 4) Losing fish once they're hooked. Actually a new problem, it was nice to get into more fish but would have liked to handle more of course. 5) A bigger cooler. The beer runs out faster when you go hours without catching fish
A few suggestions I might make...
1) Fresh line will help, I don't know how old you're tippet spools are but fresher tends to be more manageable
2) As Justin said, wait until the winter die off, it will be reduced so fouling should lessen
3) You are right, it will take mainly time on the water, you will figure it out, just be persistent and patient
4) Sharp, barbless hooks. Keep a hook hone with you on your person, scrape your hook point across enough rocks and it will get dull, sharpen frequently, go barbless if you aren't doing so already, they make smaller holes in the fish's mouth so slip outs should reduce, as long as you keep your line tight a barbless hook will hold just as good as a barbed one.
5) I am not a beer drinker so I can't help you on that one