I think tithe is a good practice for my family, both to get blessed and to bless others.
When I first made about $1400 a month as a graduate student, I sometimes feel it's very difficult put aside $140 a month and use the rest to making all livings and savings. But I'm really glad I made it. Tithe taught me how to be frugal. During that period, I knew how to make budget and not waste any extra cent. I successfully paid off my first car (a used car with 28k miles at $7500), and saved about 20k when I graduated.
After graduation, when I could earn 6 digits salary, 10% becomes a significant amount of money, more than I used to spend in a whole year. Sometimes I imagine if I save that 10%, what my life will be. Tithe taught me how to be generous. I'm not in a very small world just fighting for increase number of my account. Rather, I have more choices to contribute to the society or help people. I also found my soul mate who is also frugal to himself but generous towards church or friends. Yes, I also feel strongly blessed, much happier than saving extra 10%. Actually, I plan to save 80k this year for my family, and donate 20k. but yesterday I found that I have already saved 100k and donated 18k. In other words, I donated the money but I still achieved more than I planned.
With time, maybe an average of 20 hours a month at local community or church.