I do this:

1. when I enter the plane I have a big smile on my face, because I sincerely know this is the best flight crew I can have.

2. I greet the FAs like I know them well and we are friends. They're not sure if they should recognize me or not, and they always respond positively, making the experience positive for me. Sometimes I do recognize them.

3. I ask how their day is going and take an interest in them during the flight. We make a bit of small talk.

4. During the flight, if I need anything I do use my call button and never have a problem with doing it, although never unnecessarily. I have hit the button for:

to ask the FA to ask the pilot for channel 9 (if I forgot to ask the pilot myself or arrived too late and the cockpit door was already closed)

to ask for pillows

more coffee

fresh water

etc.

I amost always get a response.

Once when I didn't (a memorably bad redeye in C) I went to the galley and made my request and the FAs dutifully and politely complied (food, they never offered but there was a snack of cold cuts and had I not asked I wouldn't have eaten.)

It's not that I use the button even once on most flights...I don't. But on some flights the service still isn't up to par and after patiently waiting for an FA to walk by, if one doesn't, I will use the button.