What are ways "common" and not so known to practice the first kind of proper giving? One may know, recognize or have ideas about the "fist proper kind/season of giving" which leads to a better and is trained by those devoted to the Gems, and probably like to share such. 

How can "giving to one arriving (new)" be very practical and in many situations be done?

Mental, verbal (signs) and physical?

At which point it might leave it's good and lead to increase bonds and debts?

Feel invited to share for theoretical up to very self investigated ways of merits around it.

(Note: this question is not given for trade, exchange, stacks and entertainment here, but as a tiny door into another direction)
A general run-down of all aspects of the practice of Dana - the first step in the Gradual Course, the instructions usually given by Ananda to lay disciples - the very first steps that should be taken by a very beginning Buddhist are described here:

http://buddhadust.net/dhammatalk/the_pali_line/course/gradualdana.htm

In the list defining when to give, the first is to give to one arriving. That means when someone visits you or is new to an institution or neighborhood then it is a good time to make a gift to them. Welcome baskets, signing bonuses and so forth as well as the more basic: food, clothing, shelter and medicine that would be helpful to a visiting bhikkhu or for making good kamma giving what you would need in times of need.

But also of interest there: Who to give to, what to give, how to give, the best gift, repaying one's parents, etc. ... and then the rest of that Course. 

The main problem with beginning Buddhists today: they want to start at the top, with jhana practice where what should be done first is the building of a strong foundation as described in this course. There is no attaining jhana without a platform based on giving, ethical behavior, self-control and organization of the mind as described in this course.