Whenever I use glue it is fine until I go to open the container for the second time. It is always sealed fast. Well next time you use glue, throw away the regular cap and instead replace it with a screw in hook or screw eye. That way you will be able to remove it with ease and also hang the tube up somewhere.

If you do have a tube of glue that has become clogged and you just cannot get anything out. Don't poke it with a pin or needle, that can damage the tube and you end up in quite a sticky mess. Instead bore into the hole with a small drill that has been dipped in nail polish remover. Clean the drill after use...

When you have made an item out of wood and it is going to be outside a good replacement for glue is exterior oil based paint (Gloss). Coat the surfaces to be joined as you would with regular glue and stick them together...

Most wood white wood glue is water based . If your nozzle becomes clogged take it off and soak it in warm water. Cover the glue container with tape to prevent it becoming hard while you are doing this job. Once the glue on the nozzle has become soft, pick it away with a wooden toothpick or cocktail stick.

Make a simple glue brush that is great for water based PVA adhesive. Take an old ball point pen tube and thread a piece of string through it. Fray the end of the string making it like a brush and away you go. To make a fresh brush just pull a new bit through and cut off the old

When gluing small items, use wooden spring activated clothespins/pegs as mini-clamps. You can even reshape the ends of the clothespin with a file to adjust to a particular situation.