Sorry for the boring thread!
Money is really tight at the moment (as it is for many). We usually get our 20-year-old boiler serviced every September and I'm tempted to skip it this year and save the £60.
Most importantly, we have got a carbon monoxide alarm so if there was a dangerous leak we should know about it.
The other thing is of course keeping the boiler running. When we've had it serviced before (by several different tradespeople) they haven't really done anything, just had a look and done some checks. I'm not convinced that it's ever helped prolong the life of the boiler.
If you are a bit more clued up about these things than I am, would you skip it? Or does it really make a difference?