Of all the demoralizing DIYs...
Every summer I grow some tomatoes, a few years ago, instead of just buying a plant, I started growing them from seed. I still buy the seed, but, there's only a small window of time where the seed needs to germinate and then go into the ground because of the rain and general weather in my area come autumn. So the timing is crucial.
So this year I bought this fancy seed that is coated with some colored crap, I thought wow, this should be neato! Well, a couple of weeks later neato seed is not germinating, there is absolutely nothing happening in my starter pots. So I went back to the cheapy seed and a week later it did germinate, but once I put the seedlings in the ground the sprinkler's flow was too strong and it broke them. At this point it's too late in the season to start afresh with new seed all over again, so I am thoroughly demoralized with these *** tomatoes!
I did end up buying a whole plant for $2, so unless some other calamity occurs I should have some homegrown tomatoes this year. And for the first time ever I'm going to try to grow some cucumbers (from seed), this should be interesting.