I have several tricks:
- Use a post-it and paste it to my computer (usually for things I need to do as I wake up).
- Make an alarm on my phone (for general things, when I'm not sure I'll have a computer).
- Schedule a reminder email (for general things too, but when I know I'll be in front of my computer).
- I used to write on my hand when I was younger, but of course, there is always someone who asks you what's written, it has become annoying.
Have you ever bought a console / upgraded your computer for a specific game?