Super fine glue Nozzles.
 

I was just looking to buy some super fine glue nozzels and found a how to on Youtube and thought I'd share it,

http://www.youtube.com/watch?v=xuHt6QFTklc

Best solution is capillary tube. Good control and a very fine line of glue if you need it. Some glues will come with it, otherwise you can buy a length of it. I always find that model airplane shops are a bit obsessed with superglue and have a good range.