What strategies do you use to keep track of your plantings?

What strategies do you use to keep track of your plantings?

For some reason, I can mostly remember the flower varieties that I plant. I've got 4 different types of marigolds in my front border and was able to name each one even before the flowers bloomed. With my veggie beds, I'm not so good. In fact, I'm borderline brain damaged when it comes to this. 8 pepper plants of 4 different varieties, 4 tomatoes of 3 different varieties and 4 beans of 3 different varieties are growning in my vegetable beds and I am able to name only the Juliet tomatoes and that's because they are of the only cherry/grape type and are growing fruit. I did stick the identifying plastic thingy into the ground next to the seedlings when I put them in the ground but in less than a month half of them are no longer stuck in the ground. I don't know why this happens-- squirrels and birds and weather, I suppose. And then, before too long, it doesn't matter because the plants are covering the ground anyway. As seen here in the tomato/pepper/garlic bed. Tomatoes gone wild My 3rd year growing tomatoes and peppers, you think I'd have learned good spacing by now. I'm going to have to tie the Juliets onto the trellis in order to give the back row of peppers a chance. Yes, there is another row of peppers underneath the Juliets. I'd like to know how other gardeners remember. Do you know just by looking? Have a chart? Bury the markers 2 feet deep?
My garden thus far

My garden thus far

Plant ID

Plant ID

Rambler with dahlias

Rambler with dahlias

nice surprise

nice surprise

Our 2010 Garden

Our 2010 Garden

Houseplant Photo Identification? Also, Variegated Citrus?

Houseplant Photo Identification? Also, Variegated Citrus?