Couple of quick tips that work for me ...
If like me you have a static layout with lots of pointwork, isolated sections and the like and consider DCC to be for wimps then like me you'll have lots and lots of wires running in all directions under the table/boards.
Now if again like me you're a bit of a skinflint you don't like parting with money, tag-strip, terminal blocks and the like come in to the category of being luxury items.
So ... I've started left over screws screwed in on the frame under the table as terminal blocks, you can wrap any number of wires around them to make joins, douse the lot in solder and Bob's your uncle ... very reliable, very low cost and very easy to do.
Also whilst we're on the subject I've just finished making up a control panel, circular (12P) switch and eleven toggle switches in an area around 4 inches by 5 (provision also made to put in 23 grain of wheat bulbs ... as can be imagined with all those connections in close proximity it's very easy to get a short ... especially as I'm to tight to pay out for veroboard, tag-strip etc etc and prefer to simply solder connecting wires together and hope for the best. Well another long story short, the glue from a hot glue gun makes an excellent insulator, bob a dab over a soldered joint and the possibility of shorting out disappears.