Dollar Store grabbers for most things. But a rod from an old slat blind works great for poking things upright or nudging things over a bit.
Also have long gloves. They do the job of protecting my hands and arms but they are a hassel to dry out if they get wet inside, even a little.
I agree with you about the Dollar Store grabber.Paid $3.00 and you can lift some pretty big pieces of LR around in the DT with it.A few years ago I purchased some grabbers from the LFS and they were $20 in comparison,and not nearly as good IMO.
i've found that these eheim tongs are good for light duty:
http://www.bulkreefsupply.com/eheim-plant-tongs.html
The truth of it is, I use one tool more than any other when it comes to anything to do with my tank. IMHO, you cannot have a successful system without it. Everybody already has this mystery tool, yet so many seem almost afraid to use it to it's full potential. It also costs nothing and requires minimal maintenance. It has served me so very well over the years.
And what is this tool, you ask?
Your BRAIN. Think before you act. Be aware of what you are doing, and more importantly, WHY you are doing it.
hth