As my title is newbie but i have experience with the trading so there are many things which we should do and avoid while trading.
As we all know that the basic rule of trading is to buy any coin as its possible minimum price and sell it at the possible highest amount to gain the profit.
So here is the things which we should do in trading,
1. Monitor the bearish and bullish market carefully
2. Follow the trends going around the crypto world
3. Invest only that amount which we can bear to loss.
And the following things we should avoid
1. Greed while trading
2. Keep the emotions away from trading
3. Don't invest in dump coins

This is my experience which i write with clear words and what your experience and addition in this post.