I really like LTC1 and Reisa's idea of lots of plants so you don't forget. My poor yard outside gets my attention maybe once or twice during the summer (my poor neighbors) and the inside of my house has nothing but artificial flowers too like katnik, oh, yeah, except for the plant one of my students gave me for the first day of school. I set it up on my fridge because eveyone in the house waters the plants I keep on the counter by the sink, they all know I forget. So they get waterlogged and die! The one on the fridge now has one little shoot of green among all the dead leaves. It is really depressing. My mom has lots of beautiful plants, even an african violet! She has a beautiful yard. My ex-husband was really good with the yard, so I never worried about it. But my new hubby is kinda like me (that's why we get along probably) and he is always fixing cars instead of watering the yard. So our poor yard!!
Anyway, I want to try Reisa's plan. Buy lots and lots of plants so that I can't ignore them.
As much as I'd like to have plants, I kill everything. I've been saying for years that I don't have a green thumb. I have a black thumb. I have a nice looking fake ficus tree and a couple other fake plants that look kind of real. I just have to try to remember to dust them now and then.
I worked as a florist for years but I can't keep plants alive either, except an occassional peace lily because they basically tell you when they need a drink of water. I can't grow flowers in my yard either so I plant weedy things like morning glory. It's sad!

Unfortunately, I don't have a green thumb either. I love plants and really want to have them, but I just can't seem to keep them alive for long. I got psyched this winter and bought a small italian stone pine...yeah, it's almost dead. Or maybe it already is and I'm just in denial, so I say 'almost'.
Well there are two reasons plants die.
1) Everybody has plants they can grow and plants that they kill. Gotta experiment to find out which ones grow for you. I can't grow cactus, succulent plants, or anything with wooden stems - they absolutely hate me.
2) ADDers forget to take care of them and they die. I keep a ton of plants in my office. (I have cats that would kill them at home.) I can't just have one or two plants - they go off my radar and die. I keep 20-30 plants, mostly small ones. When I am really worthless at work on friday afternoons, I garden for 10 minutes every hour or so or spend the last 30 of the day gardening instead of waiting for the clock to say I can go home. (water, repot, take off dead leaves, relax)
No more dead plants. And everybody walks in my office and says wow, great plants! It is impossible to miss if I start neglecting them - an office full of half dead plants is a large reminder. 
I can't keep plants alive. I don't even try anymore. Maybe since I've been doing the crawling exercises, I will be able to keep them alive.
Do any of you keep plants alive? Or do you forget to water them, too?
I can't grow grass.I haven't killed the cactus yet. It doesn't seem to mind only getting watered every other month or so. Also, I keep it right by the kitchen sink so I can turn the faucet on it when it crosses my mind.
I don't have a green thumb, but I have found a ton of plants that I can't kill....they are all from the plastic plant family. LOL!!!!
Actually, I have found that philadendrons (sp?) are pretty hardy. You can actually grow them in a vase of water, no dirt. You might have seen them at stores with a beta fish swimming around in a vase with roots hanging down in the water. They are a pretty plant. But be careful, the are poisonous so watch them around children and pets. Ivy I have found to be pretty hardy too. As for outside petunias grow pretty fast and multiply easily. They seem to be pretty fool proof too. Especially if you live in an area that gets rain on a regular basis once every week or two. that way if you forget to water them they will do well.
I have a funny plant story. I once had this plant that refused to die. It was this palm tree like thing, not sure what kind exactly. I would completely forget the poor thing for like months at a time. It was the only plant I had. The trunk would get soft from no water, and the tree would droop towards the ground. I would finally notice, and would water the plant every day for a week or so. It was funny because the tree grew in this zig zag, 'sine wave' like pattern, from being close the death, rescued, almost dead, rescued etc.
So anyway, I had this plant for a few years. My college roommate at the time and I had this ramshackle arpartment that had no insulation, and the heating bills were so far beyond what we could afford it was rediculous. One day, it got really really cold and I needed to turn the heat on, but my roommate did not want to because it was too expensive. So without telling me, he sabotages the thermostat, ripping the little springlike things in there out from the wall, and then he went to spend the night at his girlfriends house!! I'm getting ready for bed and I notice this, too late to do anything about it. This was a college neighborhood and there were wild kittens all over the place that we fed, but other than that they avoided us. So anyway, it got down to about -10 degrees in the house that night and all the neighborhood kittens were huddled up with me under my blankets, like 20 of em. I'm allergic to cats, but I didn't care because it was so cold my eyeballs hurt to keep them open. Anyway, the next morning my plant was completely limp and black. I tried to bring it back but could not. One night of cold killed it dead. The end.
Never owned a plant.