Juicing can be a great tonic - I've had one for years. It seems to get used a lot & then over time I forget, until I realise it hasn't been used for months.
One of my favourite combinations is:
5 - 8 large carrots (scrubbed or peeled),
3 - 5 celery stocks,
1/2 -1 english cucumber (or field cucumber)
1/8th of a beet,
+ a ball of parsley or sprouts - be careful with these ingredients as they're potent.
~ all ingredients organic if possible.
The carrots are sweet so it doesn't really need more, as in fruit sugars. Sometimes I'll add an apple. The less sugars you add the better it is for you. This is great in the winter - it is really good for your skin. This amount serves 3 - 4 people & who knows how many fids.
Like you I haven't been using mine - the last time I made juice, a month a go, Laker refused to try it but I have high hopes down the road.