I think you need to ask yourself why you feel like you can't complete something. When I hear you say this yourself, I feel like you may struggle with too many good ideas or a lack of discipline to see them through.
For me, my problem is I have too many ideas, and sometime the fun of a new idea outweighs finishing an existing idea. This is where I need to rely on my discipline to carry me through to completion.
Most of my projects don't ever go past 2-3 months, but the one that is now, well it's requiring my discipline so that I can finish it. That isn't to say I just work on that, I have days I do other things to give me a break as well.
For me, my problem is I have too many ideas, and sometime the fun of a new idea outweighs finishing an existing idea. This is where I need to rely on my discipline to carry me through to completion.
Most of my projects don't ever go past 2-3 months, but the one that is now, well it's requiring my discipline so that I can finish it. That isn't to say I just work on that, I have days I do other things to give me a break as well.