@Monika - I was astonished at the number of commandments too. I hope people aren't required to know all of them, but I guess it is like anything else, if you are determined to learn it, you probably will!
I am not Jewish, nor do I know that much about the Jewish religion, but I do believe this is a good idea to do on a regular basis.
We should all help each other out, and help animals out as well. I think it is nice that they include the smaller nice tasks as mitzvahs too, like the simple task of opening the door for someone else.
Even just smiling at others and as much as possible can go a long way. It will put you in a better mood, and usually put others in a better mood to. Just acknowledging someone and saying something as simple as "hi" can make a big difference in people's lives.
I think having at least one day a week dedicated to doing good deeds for others is great! If at all possible we should do good deeds for people every chance we get.
Since I am a Christian, I believe God is the one to be praised for these acts of kindness. Of course if someone does something nice for you, you should be appreciative and thankful to them as well as God.
If you are doing the good deeds, you shouldn't get conceited. Remember God is the one who made the best possible.