I do not have a juicer, which now I'm wondering if I should buy one.
I used my hand lemon squeezer, but either will work to juice fresh, organic lemons.
Pour juice into a clean, empty ice cube tray and freeze until solid. Each cube (in my tray) holds 1-1/2 Tbsp. of lemon juice.
Remove cubes and place in a freezer container or freezer bag, label and place back into your freezer.
There you have it - real lemon juice on hand all the time.
...and of course I didn't waste the zest. It went into the freezer as well, as these were organic lemons.
I use freshly squeezed lemon and lime juice in my homemade ginger-ale, so I froze lime juice too.
My goal has always been to purchase a Meyer lemon tree and grow my own, but that'll only happen when I have an extra $50.00. That is how much they cost here. Of course you can purchase organic bottled juices as well. I have used them as a back up plan, to make homemade ginger-ale.