I like my juicer because it's easy to use
There's nothing like fresh squeezed juice. It costs a fortune to buy it - but if you squeeze the juice yourself it's much less expensive. My juicer cost $22. Ruby red grapefuit are sold 5 for $3.00 - and two grapefruit usually produce one large glass of juice. And when you buy "fresh squeezed" juice it usually contains preservatives, so it's not as healthy as juice squeezed right in front of you (or by you).
The trick is to have a juicer that's easy to use.
Easy as 1 - 2 - 3
Forget about those fancy juicers with multiple attachments. Others can be a real pain to clean. You want it to be quick and easy or you're not going to use it. My juicer, a Cuisinart CCJ-100, has a level that catches the juice and the reamer on top of it. They remove very easily and clean up takes no time flat. This model also has an auto reverse engine so you're able to get more juice out of even the tiniest limes. When a recipe calls for lemon juice I use the juicer - that way you don't have to pick out the seeds when you squeeze lemons directly into the dish you're making.
Don't put your citrus in the refridgerator
Another good tip is to store your fruit in a bowl on a counter - when you put fruit in the refridgerator they don't yield as much juice. Just buy enough for the next day or two so you don't have to worry about the fruit spoiling. You should store your tomatoes this way too (though grape and cherry tomatoes can go in the fridge).
I like my juice to be cold so after squeezing I cover the glass with Cling Wrap and put it in the fridge.