Make it part of your routine. ALways do it at a certain time.
Also can make notes to remind yourself, or set an alarm on your watch.
Write down your results so you can see how you're doing and then use these numbers to help adjust what you're doing and this can also motivate you when you can see positive changes.
If I wanted to wait that long I would not be asking now.
once you start to get complications, like neropathy or going blind you will remember to test and find ways to control your BG
http://tinyurl.com/help-with-remembering-things