If you do ask for health insurance, make sure it's explicitly clear for how long and under what circumstances you can remain covered. For example, what happens if you or he remarry? Make sure that is spelled out too (this one bit me in the ass ).
Those are a few that come to my mind.
"Diamonds aren't a girl's best friend, freedom is."
Especially since your kids are so young, ask your L about him taking a life insurance policy out with you as the beneficiary, that cannot be changed, that he must keep current until the kids are grown. It must be enough to cover any CS you would have gotten if he dies expectantly.
WH says marriage is over: May 15, 2009.
EA#2 July 20, 2009. Legally sep: Aug 16, 2009. DIVORCED!!!! Signed Nov 23, final Dec 24, 2010, adultery listed.
Health insurance for you may be tricky if he gets medical insurance thru his work. Most companies will not provide coverage for an ex spouse, but you might be able to get COBRA for 12-18 months after the D is final. Talk to your L about options there.
Be as detailed as possible about visitation. Specify exact times and place (i.e., his home, your home, neutral place 1/2 between) of pick up and drop off. Cover all of the major holidays that are important to you -- Thanksgiving, Christmas, New Years, religious holidays that are important to you, school holidays, mothers day/fathers day, birthdays. Again, be as specific as possible. Remember that you and he can always do something different, but if there are ever an issue that you need something specific to fall back on.
Talk to your L about who is the tie breaker if you and your X cannot decide on a major life decision for your child. Things like medical and school, etc, are covered under joint legal custody but if you think one thing is best and he thinks something else is best then you need to know how to resolve the situation.