I do not like shutters with wide window groups, because they are obviously fake. I would remove them and paint the trim around the windows as well as on the corners of the house and the fascia at the edge of the roof. Below is a home with three exterior colors that accent the lines of the house. The contrast between light, medium and dark tones adds drama.

The rest of your curb appeal can come from landscaping. Start by adding a concrete path from the front entry to the driveway. If you can't do a solid concrete walk buy the largest paving stones (usually 18"x18") and set them between the entry and the driveway. This will allow you to make a 36" wide path that is easy to walk on, and looks good. Here is one simple style.

It looks like there is already a planting bed between the entry and the driveway. Fill it with plants that stay green through winter, but be careful to choose shrubs that stay small. Dwarf only means smaller than the species, so check the expected mature height before you buy. Be sure to place all plants far enough away from the house and walkways that they don't crowd. If a plant is expected to grow 4' wide, plant it 2' from the house or path. Fill in around them with perennials or annuals to cover bare ground and provide seasonal color. The bed on the side of the garage is narrow and therefore best suited to small upright plants such as phlox, veronica or daylily.

If you want a shade tree make sure to avoid underground utilities when you dig. Don't plant a tree or any large shrub between the front door and the street. Don't create a mulch volcano around new trees. If your soil is heavy, deep mulch can lead to fungal disease at the base of the trunk. This applies to shrubs as well. Mulch is supposed to be temporary just to cover bare ground. You can let the lawn grow up to the tree.