What you are following now is right to find basic methodology.but if you need further development in your process, you need to go through the simulation tutorials first. There you can find a lot of information. It clearly tells you, where you should use which technic (mesh density, Adptive methods etc).
If again you need something to clarify then post your needs.
"better results" is a subjective phrase
i would recommend taking a look at this article: http://www.hawkridgesys.com/blog/solidworks-simulation-achieving-convergence-of-results/
this helps you understand the topic of converging on the results for the simulation as you have set it up
regarding getting results that are accurate and absolute to your problem in the physical world, this is where experience and experiment will be required. there are no real guidelines for that, it is a matter of understanding the physics, and adjusting the simulation to match physical to learn what is going on. eventually you will get a feel for it and will not require the experiment. the other option is using known solutions and doing the same process.
thanks for the article better i will go through it first .......