I'm going to focus on Chapter 30 today....
Marrying two women is going to result in trouble, which is one of the reasons God decreed from the very beginning that a marriage should be between one woman and one man, nevermind marrying sisters! The ongoing battle in which their rate of childbirth determined the victor was very sad, and likely this story of their heritage and ancestry was quite humbling for the Israelites.
Bob Deffinbaugh makes some great points in his sermon The Battle of the Brides
Sex, love, and marriage can never be fulfilling unless enjoyed within the guidelines determined by God. Love without sex may be frustrating (what Jacob would have experienced before he was finally able to marry Rachel), but sex without love is so much worse (what Leah and Jacob experienced - Leah never felt loved, and Jacob was pretty much reduced to a prostitute at one point). Leah also found out very quickly that neither sex nor children can create love. Things go very wrong when we become slaves to sex. Jacob circulated among his four wives frequently enough to produce a growing family, but look at what happened to him in the process. He was not the master of his harem, but he was mastered by his harem. He was pushed from bed to bed by his wives. He was purchased for the night. The passivity of Jacob in these verses is an indictment of his lack of leadership. He was a slave of sex and marriage, not its sovereign. It is also clear that marriage cannot be fueled purely by physical attraction. Jacob seemed to love Rachel purely for her looks, and Rachel did not feel any more loved than Leah did.
Sin tempts us to think that God is holding something back from us by having such narrow guidelines for sex. But God's commands about sex are not given out of stinginess or to take the fun out of it. On the contrary, God designed sex and He designed it to be most fulfilling when in enjoyed in the exclusivity of the marriage relationship. Which means, we need to make the correct choice in choosing a mate - and look at Abraham's servant's method as an example over Jacob's.
Tomorrow's Bible In a Year Passage passage: Genesis 32-34