Don't be afraid to experiment, to try new things, new sizings, new lines etc etc.

If your site lets you see mucked hands, ALWAYS look at this. Always look to see what people had in different spots, it's the only way to really good a good feel for ranges.

If someone does something that you find difficult consistently ask yourself why? Why is it difficult? How are they exploiting me and how can I use what they are doing vs other players.