I want to second this. Decluttering is definitely a huge way to improve your life, and physically removing things from your home also helps to removes mental distractions.

I made a conscious effort to really consider what I need before purchasing things over the last 6 months, as too often over the years it felt like I was drowning in a sea of crap! Sell your old unwanted items on ebay/gumtree/wherever and save that money.

'Tidy desk, tidy mind' isn't just an old wives tale.