Here a few general tips (thing I'd do if I played):
I'd focus on diplomacy with my natural allies, getting to know them.
I'd deal with event that crop up in the SR.
I'd keep things simple.
Game-mechanically I'd focus on improving prosperity across the board. Agitation, rule law (I'd even consider taking 20 to get that last law level in my high-level provinces), agreements with other law holders to max my resistance to prosperity loss, getting those bless lands going. In a year prosperity should be much better, and most realms will gain a 1 point improvement in stability as well.