There are a lot of recipes you can find online, but a vast majority of them use too many fruits and thus it's too much sugar hitting the bloodstream...but that's for me. The vegetables I use the most are carrots, celery, lettuce/cabbage, and tomatoes. My wife will throw in others such as spinach, broccoli...whatever we have in the fridge. The taste isn't that bad, but I typically throw in one apple or a handful of grapes to sweeten up the overall flavor.
When you look online you are going to find recipes that attempt to target certain areas, problems, etc., but we don't use the juicer that way. We simply use it to add nutrients to our diet. Drinking the juice allows for more nutrient absorption because the body doesn't have to break down the fibers to get to the nutrients. I've read that the body absorbs less than 5% of the amount of beta carotene in a carrot when the carrot is eaten raw, but that almost 100% of the beta carotene is absorbed when juiced. It's also recommended to drink the juice right after you make it, again in order to absorb more nutrients.
As someone mentioned previously, eat the pulp. This isn't necessary, but all of the fiber is in the pulp and it can be added to meals so that you aren't wasting food. And of course, juicing does not replace eating fruits and vegetables, it is just a supplemental process, though if someone went from eating practically zero vegetables and then started juicing, that person would certainly see positive effects.
The biggest chore is the cleanup, but our juicer breaks down into a few large pieces pretty easily. My wife complains that it immediately fills up the sink, so I suggest she should have emptied the dishwasher first. Then I go to the gym or golfing to give her time to cool off.