Keep in mind risk management rules and always trade with stops.
Always stop trading and take a rest after very profitable trade or a large loss.
Write down all the trades to have enough information for analysis.
Don't spend/invest more than you can just allow yourself to loose like for fun anyway. In any way do not take any loans for that matter and everything else like that. Only invest by your means. Go for reputable broker with real life reviews which can be verified.