When you have a question about Torah, particularly about how to behave in this or that situation, it is a very good idea to look at the Torah Priests.
According to the Torah, a Priest is someone who is the descendant of Aaron and who is completely dedicated to live his life according to the Written Torah. At the time of existence of the Tabernacle, priests would also be required to serve there.
Priests were separated from the rest of the Hebrews and even their brethren (Levites) and had a special set of commandments applicable only to them. While Torah is very clear that some commandments are for the priests and some for regular people, there are less clear situation in which Torah seem to imply the priests as a desired ideal.
For example, Priests were required to marry only virgins, eat only the best of the best food and a High Priest was required to wear a special Golden Frontlet on his forehead. These are good three examples that should give you an idea of what I am talking about.
What does it mean?
Well...it means that even for a common Hebrew man it would be desirable to marry a virgin instead of a divorcee for example.
Or, if it is possible, one should eat not just the best food, but the best of the best.
Or, the last example with the High Priest is pretty much a direct description of the so-called Tefillin that was required to be worn even by the commoners. In this case, a commoner would not wear Gold but some cheaper material and different inscription (the 10 commandments are assumed as an inscription instead of "Holy to Yahuah" for the High Priest).
So as you can see, when you are not sure what to do, ask yourself: what would a Hebrew Priest would do? How he would behave? This should assure that you will make the right choice in life and in this particular situation.
Having said all that, please remember that some thing were reserved ONLY for the Priests (i.e tithe or 1st born animals or firstborn ransom silver) so a commoner should never desire this for himself as it is holy to God.
So think and act as a Priest, but do not forget that if you are a commoner, you still have to give the best of the best to them and do not keep what is God's for yourself.