Identify my own weaknesses and game or sidestep them.
For example buying groceries in the store leads to impulse purchases, particularly when I'm hungry. Ordering groceries online means I consciously think about what I'm buying, so the junk/crap/convenience stuff never makes it into my house. If it did, it would eventually get consumed.
Money stuff is the same. Consciously developing set & forget behaviours, which makes most money/investing decisions happen on autopilot, avoids getting sucked into the latest hype (gold/bitcoins/p2p lending/whatever). Pretty soon I wasn't having to make regular money decisions at all, because I'd just follow the plan.
Biggest threat was boredom actually, fighting the urge to tinker with things when they are working just fine.
I showed you mine, now it is your turn @F2P