M.G.
I took the Depo shot once...and once was enough. I bled the entire three months it was "good" for, I was starving ALL THE TIME {and consequently gained about 30 lbs}, my mood swings were out of control. I know a few people {not many} who have taken it and did great, but I will never, EVER do it again myself.
The way I remember to take my pill every day is 1. I set an alarm on my phone to go off the same time every day, and 2. I take it at bedtime, rather than in the morning. Especially when my child was little, bedtime was more regular than getting up time! I've done it this way for about 7 years and it's worked well for me.