If one who trusts in H'shem loses his money, he will not forgive or mourn its absence. Rather, he thanks H'shem when the deposit is collected just as he thanked Him when it was first given to him. He rejoices in his portion, does not seek to injure anyone, and does not covet anyone's property pg 361
Women accept Shabbos when they light the Shabbos candles at home. L'chatchilah, they should daven the Friday Mincha before lighting candles, but b'diavad, they may rely on the poskim who permit women to daven Mincha even after lighting candles.
Early Shabbos begins when the congregation recites Mismor shir l'yom haShabbos in shul. Once that psalm is recited, it is considered as if Shabbos, in all its aspects, has begun even though it is still bright daylight outside. Thus, one who is bringing in Shabbos early may no longer recite the Friday Minchah, but instead, he may daven Shabbos Ma'ariv, recite Kiddush, and eat the Shabbos meal. Obviously, he may no longer transgress any of the forbidden Shabbos Labors. It is permitted, however, to instruct a non-Jew or even another Jew who has not yet begun Shabbos to do a forbidden Shabbos Labor on his behalf until sunset.