Prior to my transplant I tried to be on a low protein, low sodium and low phosphorous diet. It's mostly meats and beans, especially processed meats like hotdogs, brats, and (ugh) organ meats-like liver that are high in phosphorous. You can do a search on line to find out which foods you should avoid and which foods are good for you in kidney failure, both chronic and acute failure. I don't think we can suggest sites that advertise on here, but one of the top kidney dialysis organizations has tons of info about renal issues and what helps/hurts.
One practice that I've seen a lot of people do is to increase their potassium intake by using potassium products instead of salt, and this can be dangerous with those of us who have had kidney issues. Usually our potassium is low because of taking diuretics and the diuretics seem to flush the potassium out of our systems, but I have found that sometimes the potassium is high, esp with end-stage kidney failure, we just don't metabolize it the way we should. Therefore, taking extra potassium can get us in further trouble.
Having said all that, unless your doctor recommends that you start on a renal diet, I think the best thing to do is to maintain a nutritionally sound meal plan to make sure you get all the vitamins, minerals and nutrients we all need. Just my 2 cents! Good luck!