The last 20% of any project is where 80% of the work lies. At the beginning its fun and frenetic, you can write tons of code and feel like you've made big progr

The last 20% of any project is where 80% of the work lies. At the beginning its fun and frenetic, you can write tons of code and feel like you've made big progress. The last 20% is integrations, debugging, sometimes painful bits you had deferred to later. What you need is discipline, not motivation. Motivation is fleeting, while important, it always runs out. Work on making a schedule and sticking to it as a goal unto itself. Make a contract with your future self and do it. Discipline is something you need to train, so expect to fail at first - but strive to improve in a structured way. Also a note on small thing that has really helped me - don't tell anyone about your project till it is finished. I find talking about your half finished projects gives a similar sort of dopamine hit to finishing and can rob you of the gratification which would drive you to finish.