Unfortunately your picture does not enlarge when clicked on so details can be better seen. You have two sets of shutters? I would remove them as the other windows are with out. I love the yellow door but the side lights are detracting from it. They appear as shutters for the door??? I would start with a trim color. I see the faux hinge detail on the garage, perhaps you could get more of a carriage door look with windows and if they matched the trim they wouldn't look like they 'stuck out'? Getting larger light fixtures to go with the 'carriage' vibe would complete the look. Updating the columns with something more substantial and the railing would be worth looking at bang for your buck. Bottom line you need some definition and come COLOR.

What trim would you add color to?

Definitely remove the shutters. Paint the dark area around the front door white, so the door will stand out more.

Redo the plantings around the house; find a good landscaper and let them work their magic. If you are more a DIYer, some landscapers and/or nurseries well draw a plan for you (for a fee) and you can do the work.

Add windows to your garage doors

Take down the shutters

Add larger sized exterior light fixtures

Maybe add some interesting details on the garage gable like a bracket or wall pergola.

I would consider replacing the farmhouse spindles on the porch with cross bar railing like you see below.

Some option

or to go with white

or with pergolas

Adding the windows if/when you replace your garage doors would be a good idea to consider.

In the meantime, you might consider adding an "overhang" of the roof over the larger garage door.

http://www.pleasantvalleymodularhomes.com/homes/greenfield

Paint the garage doors a similar colour to the roof. Add a belly band below the gable. I like a decorative house address - YMMV. Double the size of your lights.

Or paint the whole gable.

Neighbors home was mono chromatic tan and one day trimmed it out in DARK brown. Looks quite stunning. Given you like the white I suppose black would be the most traditional.