When you end, you do have to end in an empty square. Once you've secured and snipped your thread, you're free to stitch over it in any color that you please. When I've almost completely filled a section with stitches, I start to plan, so that I can end with a pinhead stitch for as many stitches as I can. Sometimes, when I'm out of room, but there's the same color close by, I'll end the pinhead in the hole directly next to where the last stitch was. I haven't tried that trick on aida yet, but it's working beautifully on evenweave, when stitched over one.
When there's no blank area left to end, I run the thread (on the underside) through a few adjacent stitches, and then snip. It's not as neat as the pinhead, but it's MUCH neater than knots clogging up the back of your work! Much nicer for framing, too. The back isn't so bulky, which tends to show...especially on aida.
My flea-mergency is my cat. We've been trying everything short of boiling her in acid, to try to get rid of the fleas. They're bionic, or something, because even after multiple treatments, they're still going strong. And now we're starting to see them in various places in the house. I'm so

, you can't even imagine! So now I'm trying to deal with the house issue, a geriatric flea infested cat, and my son, who is like... "The Flea Whisperer". I find him sitting very still, next to her, picking them out one by one, and looking at them.

Same thing when those big flies get in from the outside! He sticks out his arm, and they land on him. Like hawks, for heaven's sake! Then he tries to grab them (he usually does), and in that moment, I'm so scared he's going to eat it that I could die!
What did you do to get rid of them for good? I'm desperate to not spend extra money on "miracle cures" that don't work. I'm tempted to toss her at the vet, and just call Terminix...

......
