I try to check my post twice a day, once in the morning, and once at night, it works for me and keeps things up to date. I agree with the 48 hour rule, coming back once a day is not that difficult, and if it is, maybe you should not be in voting contests which require considerable time commitment. The only other thing is suggesting people make a bookmark of their contest so it is easy to check, click on bookmark and boom you are there, no searching through the list. I figure if those in the jail were active, I might get another 50 votes more or less, which could mean the difference between winning and losing.
I wish I could suggest a magic solution.