Oooh, that's a good tip! My joins are always loose for a couple of rows, that would fix it right up I bet!!
Another tip I couldn't live without (specially since I'm still working on the checkerboard from H-E- double hockeysticks :evil: grrr...):
When working w/two or more colors (or even just with one, sometimes) I use those diaper wipe boxes to hold the yarn. It fits neatly in my lap or on the floor next to me, the yarn balls don't roll all over the place, and if you get the pop-up kind there's a ready made slit in the lid that you can thread the yarn through. (mine I made by using my wood burner to poke a hole in the top...I DO NOT RECOMMEND DOING THIS! It stinks and it took me forever to get the plastic off my burner tip.)
If you don't have kids, buy a box of wipes, anyway - just pop the wipes into a ziploc bag (where they stay fresher than they do in the box, anyway) and stick the box in your knitting basket. You can use the wipes for quick cleanups in the car (either for you or the car), they work good for wiping the dog in between baths, cleaning muddy feet (or shoes) - also for removing makeup, grease from your hands, etc, etc,...just get the kind w/o alchohol, the ones with alcohol dry your skin.
If I think of anymore, I'll let y'all know!