Just do fun basic things, worst thing to do is try to impress with gifts outlandish things etc.
Remember you are trying to get to know the person, so do something which allows for talking but something also to take the seriousness out of it, if it calls for it etc.
If they find something like that boring then all they are after is a free ride to do some fun stuff at your expense and well not interested in who you are at all.
My first date with my now wife, wasn't actually a "date" at all. She had got out of a bad relationship a few months beforehand and she had lost her father unexpectedly a few months before that.
She wanted to get to know me, but didn't want a commitment of a "date", so we arranged to meet up had a small bite to eat and chatted in a pub and had a laugh, she said that it was one of the most comfortable nights out she had as there was no pressure as we both knew expectations.
After that we did these nights out more and more and then we started doing more fun things together, going to zoo's (she loves animals etc) going to see car shows (She also likes cars) Now we are happily married for nearly 10 years.
Of course people are different but I would really test to see if they are actually genuinely interested in you for who you are, rather than free food, activities, shopping... etc.
I swear in one of my previous relationships her wardrobe was full of clothes from guys she had duped into buying them for her only for her to dump them when they said no. Luckily I saw this fairly early on in the "relationship" and ran a mile.