Lots of wisdom here, especially what Gump said.
I don't pretend to be any great backcountry pilot myself, but here's my two cents:
--Treat every landing like it is important. Don't get casual and don't waste opportunities to get better, no matter what you are flying. Landing short of your target is not an option you should tolerate. Make it a point to study the differing effects of temperature, elevation, wind, slope, and load on each flight. Whatever you are flying, know how long it normally takes to lift off (one potato, two potato, three potato) and compare each takeoff to that standard to assess whether everything is still a go.
--Learn in small steps, not big ones. Much better to build your skills and experience incrementally, than throwing yourself too far into the deep end and learning an expensive lesson. There will be time to push yourself in the future, but not until you've sharpened the fundamentals Gump talked about.
--Never underestimate the value of learning in the plane you're in, no matter what it is. I learned in a PA-11 with no flaps, and now fly a PA-12 with no flaps. Slips are a great skill, and they make you a better pilot. Every time I fly something with flaps now, I feel like I'm getting to cheat!
--Leave yourself plenty of margin as you learn. All new skills should be worked on and mastered up high before you ever take them down low. Similarly, make sure you can hit your spot on a long wide runway before you ever start having to hit the spot on a short, narrow, or no-go-around strip.
--Don't be afraid to go around. During every takeoff and every landing, you should be asking yourself whether everything is working right or not. Don't make the mistake of thinking that, just because it usually worked out before, it's going to work out this time. You need to be present in each takeoff and approach, analyzing your feedback in real time, and prepared to abort if you don't like what you're seeing. Airspeed management is beyond critical in backcountry ops. If you're not on-speed on your approach, go around and do it again until you are.
--Do as much vicarious learning as you possibly can. Lessons learned from the mishaps of others are much cheaper than paying the tab yourself.
--Don't be afraid to ask questions, never think you're too good to learn from someone else, and be open to criticism if someone cares enough about you to tell you how you can improve. There are guys on this board who have forgotten more than I'll ever know about flying. Don't be shy about asking for help in this forum, or going to accessible fly-ins even if you don't have a hot rod plane, or walking up and introducing yourself and striking up a conversation.
--Practice, practice, practice, practice, practice, practice, practice!
