I've been prop trading for over 2 years, and am with my 3rd firm. Prop trading is paying my bills. Seen a lot of people successful traders and a lot of people fail.
DO's
1. WORK HARD: Come in early, stay late, go over all of your trades. The learning curve is steep, and a lot of people never make it. With hard work you can become profitable in 3-6 months.
2. KNOW THE OTHER TRADERS: Find out who the profitable traders are, learn from them. Find out who the unprofitable traders are, they are often the ones most willing to give advice, be skeptical of their advice, learn what they are doing wrong.
3. STUDY INDEPENDENTLY: Supplement any training you receive with outside reading. Learn as much as you can about technical analysis, trading styles, successful traders and trader psychology.
4. KNOW YOURSELF: I've seen a lot of people fail, and it almost always comes down to the psychological stuff. Recognize when you are pissed off, fearful, greedy, too aggressive, too risk averse, etc
5. KEEP RECORDS: Keep track of your daily and monthly results, keep a trading journal. Be able to track your progress, be aware when you hit a slump and figure out what you need to do
6. STAY POSITIVE: The most vocal traders tend to be the ones losing money. You can make money in an market conditions. If you are in a slump, find ways to make money. Ignore the losing traders who are complaining and waiting until "the market is good again"
DON'Ts
1. DO NOT BLAME THE MARKET: Accept responsibility for all your trades
2. DO NOT BLAME THE PROP FIRM: They're a dime a dozen. If you have legit complaints or can get a better deal elsewhere, then just go. Don't expect them to hold your hand, this is a business for independent people.
This is the best job in the world if you can make money at it. Good trading