I always love reading about other people's beauty bargains and products that have 'changed their life' (I know this is all relative, it's just personal grooming after all). This is one of my life enhancing products:
The Instant Nail Polish remover from Pretty Quik (I don't know why they jettisoned the 'c'). This is a little plastic tub which holds a sponge soaked in polish remover. There is a little slit in the middle into which you insert your fingertip. Then, as it says on the label, simply dip and twist.
I find this product is brilliant for removing polish in a hurry. It is particularly good with dark polishes and even those pesky glitter finishes, though a double dip is sometimes required. Even though it's like a bath of polish remover it does not dry out my nails, in fact it feels quite nourishing. It really does remove polish in seconds though and even with blue polish I never end up with the dreaded 'smurf fingers' and stained nails I usually get with a cotton wool pad.
One tub can last quite a long time, but it depends on how many dark polishes you remove as the sponge obviously becomes saturated with colour eventually. I buy mine from Superdrug and they cost about £2.50, I think. They also do a similar product for use with acrylic nails.