Ginjosie - interesting to hear about the fly traps, I'll use that next year...they're less of an issue now that temperatures are dropping...that is until you open one of the 'chosen' windows in the top of the house and they hurtle out from the frames!!! YUK!
Mary - suffice to say...'you and me both'...there are a few things which seem to escape my usually rather pacifist outlook!
I've used the nematode control (nemslug etc available from many websites) for several years. It is never 100% effective but I've trialled it over the years by not applying on some parts of the garden, delaying, diluting the applications etc. and now I won't use anything else and in general don't find I need to!
Downsides are:- a) the cost b) remembering to do the reapplication c) it appears less effective against snails, but in my case these are a lesser problem.