\> Making sure the money you lose goes to a good cause is very noble. However, if you want to get some extra accountability pick a foe or an anti-charity. Knowing that your money will go to a person or cause that you don’t like will push you to work extra hard to achieve your goal.

This is is like self-flagellation. The ways we try to program ourselves is quite funny sometimes, I find the putting money at stake vs anti-charity approach more interesting though, but it would have to be a high enough amount that the person should care about losing. That makes things a bit tricky, and I guess the benefit of bitcoin is that it can be cheaper to move from/to your account.  
  
For the anti-charity one, thinking about it now I guess the reason to support both options is that someone might find their beliefs more important that the money they would loose. If you put 50$ at stake for if you complete your task but don't care about that 50$ it might just not get done.

There could also maybe other types of non-monetary one like if it would automatically message someone you don't want to message could also be interesting to keep people motivated. Could be some interesting cryptographic stuff done there too. It in a way also acts as a deadmans' switch.