What I learned today:
If you have not Euro sign on your keyboard, it can be quickly brought up the following ways:
1. Press Ctrl+Alt+E
2. Press Alt+0128
I am particularly impressed by the first one as I can never remember the 0128 of the second one.
Gecko_gr made a comment on this post a while back which I thought I should bring to the front of the entry.
Right ALT key + 5, or ALTGR +5