Many casinos have incentive/rewards programs you can join and are often free. It's customary to tip on each win and then again when you leave the table. When tipping, always do so in chips, never cash. When it comes to your chips, never touch them once they are on the tablet and likewise, don't touch your chip earnings until the dealer is done handing them all to you. Never sit at a table unless you are playing. Never take your phone out when playing a table.
And because of cheating, the rules in casinos can be strict. It's no fun getting yelled at by a pit boss or dealer for doing something wrong.