As someone who gives up on ideas after a week of work ( not after 30 minutes ), I must say the New-Shiny-Idea-Monster is pretty kind for you ;-) Maybe try to w

As someone who gives up on ideas after a week of work ( not after 30 minutes ), I must say the New-Shiny-Idea-Monster is pretty kind for you ;-) Maybe try to write down each of your ideas, give it a +1 vote each you think about it. After a month select the one that had the most votes and try to implement it. Writing to down the idea might be enough to give you strength to postpone executing it immediately.