Spring brings flowers with it and adding flowers to your home décor. Make sure to do this in more than one way to give your design cohesion. For example, use scented candles or air fresheners with similar scents to the live flowers that you bring into your home (remember to water and rotate every five days to keep things fresh!). When you add flower patterns to your curtains, pillow or throw covers, or in the form of art, you add a further visual element to bring the effect together.
A new set of bright curtains in gray, white, silver, gold or a light blue or green can liven up your house with the increase in sunlight you will be receiving. Curtains with a bit of translucency can be great for the spring season, as you can keep them partially closed while still letting some diffused light into your home. Curtains in pastel colors in general (See below) can be an easy way to add spring feeling to darker painted room but be careful not to overdo it when you use them in an already lightly painted room as it can be overwhelming.
Add some springtime brightness to your furniture through some new patterns. A fun and vibrant duvet cover can spruce up a couch significantly, especially when your pillows are new for spring too! Flowers are a classic choice, but I like adding animal patterns to the mix to keep with the Easter and the other spring holidays.
As a general rule, spring is the time for pastels. Bust them out wherever you can to lighten your home and induce some liveliness. However, be careful to watch out for clashing situations with your other furnishings and decorations. For this reason it is a good idea to choose a couple different pastel colors. You can use more pastel blues in a room where yellows or reds might clash, and vice versa. To keep continuity between rooms with pastel colors, try to incorporate a small amount of a secondary pastel color which you use in another room.