At this time of year we all need a little boost. Colourful spring fashion is trickling into the shops now even though warmer weather feels like a distant dream!  But there are simple ways we can start to throw off winters gloom.   Small treats can actually make a big impact when it comes to boosting your mood.  I experienced this last myself weekend when I bought a new "spring" nail polish. A very, very pale pink, almost white shade by Essie which has been on my nails since Friday!  Yes I love it, and…