Wow, thanks for all the advice and feedback everyone! Wyvern, it sounds like I don't need to trim much right now then. My wisteria is still really short and I'm trying to encourage the tops of my moneywort to grow emersed (I've heard they flower!). I just need to trim some dead roots that are sticking up. I like the letter opener idea, Thunderloon. Think I have one of those somewhere . . .
Betta311, thanks for the offer but I think I'll wait and see how trimming with the plastic letter opener goes first.
OFL, I think my fingers are too fat for planting, haha. When I try to plant using my finger, I end up dislodging the plant next to the one I'm trying to plant. For that reason, the tweezers work well for me. But it took a bit of practice at first and I almost poked myself in the stomach once. I really shouldn't be allowed around sharp objects. >.<
I'll post a pic of the tank in question soon. I'm in the midst of planting all my "permanent" tanks so I'm just waiting for the rest of the plants to arrive. Very excited. Thanks again everyone!