We always use ginger instead of over the counter cold remedies ...

Girl with temperature

Crushed up fresh ginger works wonders for the immune system. It can be combined with fresh squeezed lemon (or bottled organic pure lemon juice), a little honey (optional) and hot water.  Tip: Having thrown out so many bits of ginger that had shrivelled up in the fridge or started to go mouldy I came upon this fantastic tip and now always have fresh frozen ginger to hand and never have to throw any out. Buy a small amount of fresh ginger root (preferably organic), cut it into chunks and put it in the freezer. When I need to use it I take out a chunk and grate it using a fine grater - no need to peel the ginger first. Put the remainder of the chunk back in the freezer.

Haven't tried this yet, but one recommendation I found was to put a few drops of almond oil in your nostrils, which apparently helps to releive symptoms of cold.

When you are really stuffed up, nothing works quite like a humidifier ...

A humidifier works by putting moisture into the indoor air. Humidifiers can be cold mist or warm mist and though we usually recommend warm mist for respiratory problems, many people use the cold mist and find it works well. When your nasal passages are blocked and dry, moisture in the air helps to releive the drybess and can also help with breathing problems.