Do you find it's best to immediately review newly added Kanji (Blue column) as soon as you add them, or wait a day before reviewing?

I've been reviewing them asap and it works quite good i think. I find if i wait too long I forget what i've learnt and half go to failed straight away. So actually if i study but forget to add to the SRS i will study them again as if its the first time... Which i think is the best thing to do. Of course it sucks to do that.. one day wasted!

Yeah, I was pretty nervous about that initial 3 day interval as well. What worked well for me was as follows:

1) Review all expired kanji (incl new kanji from the previous day).
2) Make stories for new kanji.
3) About an hour later, review the new kanji (I used some non-SRS flashcard program for this) - work a little harder on any stories that I couldn't remember. Go through the stack until I feel like I have solid images for all of them.
4) Add the new cards to RvTK.

This may have been slight overkill, but generally I only had to go through the 1-hour cards once, plus repeats of maybe 8-10 failed cards - this was out of roughly 70-100 kanji per day. I feel the day-of review is important to screen out any flagrantly poor stories right off the bat.

My story is almost the same as Nest0r I used to review cards immediately after I had learned them and put them in the blue stack. This resulted in me failing a lot of those cards in the review of 3-days later, and a huge failed stack at the end of reviewing.

I now learn cards, add them to the blue stack and review them the next day. That way I will know which cards I have not learned properly the day before, because I will have already forgotten those. I will not fail cards from the blue stack, instead I will pay extra attention to the story again, and then click "yes".

Not reviewing the blue stack immediately after studying, in addition to relearning failed kanji the next day, instead of immediately after the expired cards review, has raised my recall rate from a horrible 50-60% to 80-90%

Nest0r, reviewing stack by stack has been discussed before as being counterproductive. Your recall rate on grouped kanji is not a good indication on how well you are able to recognize/reproduce a kanji outside an RtK context.

I tend towards immediate review?if I don't know it well enough after a gap, well, the card will end up back at the bottom of the stacks soon enough anyway. Meanwhile, getting it right once off the bat both helps fix the character in memory and provides a morale boost to push for another section.

I think its good to do a quick immediate review after learning a batch of new kanji, just by covering the kanji in the book and trying to remember them from the keyword.

I think of this as just a way to help check if the stories are at lest learned into short-term memory, before I let the SRS do its work to move into long-term memory.

I don't count this as a review on my SRS though. 1st repetition on SRS is one day later. I think is important, because of the relationship between sleep cycles and moving things to long-term memory.