Last night I was working on the last parts of my fat giant man and I got a bit tired of it and just set it aside for a while. I find that 75% or more of the work on a miniature is actually done very quickly, but the remaining 25% where I add details that make the miniature pop can take a significant amount of time. When I get close to the end of a miniature, I sometimes just rush things because I want to get it done which gives me less than stellar results. What I should do, and what I reccomend to you, is that when things get a bit tedious and you don't feel like moving forward, just set your project aside and walk away for a bit. Are you on a time table? Do you need to get this done now? No. So just walk away and come back later refreshed and ready to go.