Hello,
excellent subject here, thanks !
Well, what I personaly try to put or how I put it in a WIP to make it interesting...?
- introducing the build: talking about the model is normal, but I think that introducing a bit the car too may people understand our personnal interest to the model. Why this car, Why this driver, Why this rally (for my part) etc ?
- showing the progress the closest possible: each part or almost each part could have its meaning in the model, especially what is scratch built.
- good pics: not easy for everyone, we are modellers !

seriously I personnaly use a Canon EOS 300 D, with the autofocus close up pics are almost impossible to get perfect... But I try to, better will be the pics, higher will be the lust to follow the thread...
- Good explanations: I may have to check my own thread about that but "I painted the part" is less interesting than "How I painted the part" even if some of these things are so evident...
- updating often: of course it's easier to say than to do, but I think that keeping attention depends on how often you update a thread.
I take only one example: Sean Stratos Thread: following such a detailled thread day after day or almost take all its sens, according to me the most detailled are given the most often the thread should be updated, simply to really feel progressing with the build. What would you feel if someone is detailling a full engine and give updates all 2 weeks ? you may feel you're missing something...
Of course on the other hand updating for each bolt you put would be too much !
- Answering questions : That's important, if you expect people to follow your work answer all questions the most precisely possible.
I personnaly let threads fall down because I was never answered... What' the interest in a thread if you get no interest when reacting to ?
- lot of pics but not too much : I don't have a very performing Internet band, so when the thread contents too much pics I sometimes let it fall down...
no need to put 36 pics of the front right or the exhaust.
Prefer checking you posted at least one pic of all the car sides and sens !
I sometimes have seen 8 or 9 pics of a sens view, and nothing about another sens view... (especially in completed section that's rigt, but sometimes in WIP section too).
that's what I think about WIPs !
... and would have to do or improve myself !
Phil