I generally call my girls either "honey" or "darling", but I wouldn't necessarily recommend this as a technique, it's what I became comfortable with pre GC. So comfortable in fact that I occasionally call my mum or my sister that in conversation by mistake, haha. I suggest to not sweat it and to do whatever is comfortable, preferably using a pet name related to some in-joke or something, like I remember my first live in GF and I used to call each other "the bear" for some unknown reason.
What I can recommend though, is using terms of endearment as liberally as you use touch, e.g. you chat with the waitress, as you're leaving give her some solid EC, a smile and some touch if she's in proximity and say "bye darling!"... assuming familiarity is a very powerful technique which is useful in all sorts of situations. When I introduce myself as "Raymond" and they immediately shorten it to "Ray" and use it liberally in conversation I immediately think "I like this person. He/she is friendly and confident (casually dismisses social fears)."
Send good morning / good night texts -> NO, NO, NO... that's needy, insecure and chasey. From a girl this kind of behaviour is expected and desirable. From a man it's not. Instead you let her do these things and respond warmly when she does, as if you were busy doing some work and she's just reminded you that your relationship is also important. If she does it regularly then after a few times you can reward her investment by initiating yourself at a time she'd likely be thinking of you.
Buy her gifts -> NO, at least not initially. I would recommend to only buy a gift on her birthday or Christmas and even then, do not go overboard. For my girlfriends' last birthdays I spent about $30 each (girl 1: a feathered bangle that I noticed the preceding week because it was exactly her style, girl 2: a mobile battery charger I mailordered b/c she was often running out of battery during the day), BUT, I personalized the gifts in ways that took a lot of time and effort (girl 1: a hand calligraphed birthday card with intimate sentiments, girl 2: a complicated cake that I baked while she was at work and surprised her with, with balloons and candles and a small group of ppl who care about her, when she came in after work). Expensive gifts look like you're trying to buy affection, whereas personalized gifts show you care (girl 1: she's sometimes insecure about the r/ship so I thought she would appreciate the card, girl 2: she's living far from home and has no family to make a fuss over her, so if I didn't do it, it would've just been another tiring workday for her, a horrible feeling).
If she buys you gifts you must thank her warmly and be sure to use the gift and remark on it frequently with strong EC and touch to show your appreciation. And needless to say give her lots of good sex, particularly on her birthday, remember YOU are the best present you could possibly give, you sexy man

If you must give her gifts, do it as part of leading and organizing interesting experiences for her, for instance I bought my GF a football jersey in our team colour when she accepted my invitation to a football game. Also restaurant meals etc.
Remember that when she starts to pull away the temptation is to text her more, give gifts etc... DON'T!!! But do remember to do those things occasionally when she's being a good girl and to constantly praise her and show appreciation for everything she does! And read GC articles about being non reactive and handling drama, and tests. If you do this right your relationship will be in great shape for the long haul.
She will constantly test you, you need to always be aware of what precedent you are setting, e.g. once I decide to make love to my girl on any given occasion, it happens no matter what (some truly epic struggles have ensued from this but she has always submitted eventually, even if I had to get creative with spankings, takeaways and so forth). This is because given my terrible experiences in marriage and other r/ship I am determined never to set a precedent that she can decide when we have sex. I also make love to my girls every single day, every time we hang out, no matter what, for the same reason -- relationship is ALL about precedent, and dare I say it, operant conditioning. Train her that Dylweed = sex, sex = Dylweed. Then you have all sorts of happy associations helping you out
Ray