Geo Bell 8/2/2016
A night's sleep consists of a number of cycles. Each cycle is approximately 90 minutes long, starting with non-REM stages of sleep (including deep restorative sleep) followed by a bout of Rapid Eye Movement or REM sleep. 
REM sleep is associated with vivid dreaming, and as the night proceeds the time spent in REM sleep increases. By waking up after 5-6 hours of sleep, you're likely to enter REM sleep soon after returning to bed.
How-to: Wake Back To Bed
You need to wake yourself up after 5-6 hours. Any sooner than this and you're likely to feel groggy, which doesn't help if you want to become lucid. The easiest way to do this is to set an alarm before bed. Another method is to drink a large glass of water directly before bed, so that you have to wake up to pee half way through the night.
The term "Wee-Back To Bed" was coined by YouTuber Reece Jones in 2013.
Now that you're up, write your dreams down from the first half of the night. The length of time you stay awake depends on a number of factors. Studies suggest that the optimal time for successfully achieving lucid dreams is between 30-120 minutes - this is a rather large range.  Shorter periods appear to be less effective, so try to avoid going straight back to sleep. On the other hand, it may become harder to fall asleep the longer you stay up.
We suggest spending at least a few minutes writing your dreams down, then think about what you'd like to do in your next lucid dream. Have a read of your to-do list at the back of your dream journal.
Write down your plans for your next lucid dream in a couple short notes and go over them a few times. Be clear of your intentions so that you don't forget them once in the dream!
Now you should practice whichever lucid dream induction technique you are going to be using. If you're aiming for a DILD, you'll be using one of the cognitive techniques (MILD, autosuggestion, recognising dreamsigns) and you should perform the technique until you fall asleep.
If you're attempting to transition straight into a lucid dream (WILD), you'll need to perform the WILD technique.
And that's all there is to it! Every oneironaut will undoubtedly have their own unique WBTB ritual. Time spent awake can be extended into the late afternoon, resulting in a lucid nap. This is also an effective method, but can be tricky for those on a busy schedule.
The best thing to do is experiment with different timings and techniques until you find what works for you.
1. LaBerge, S., Phillips, L., Levitan, L. (1994) 'An Hour of Wakefulness Before Morning Naps Makes Lucidity More Likely', NightLight, vol. 6, no. 3.
2. Silber M. H., et al. (2007) 'The visual scoring of sleep in adults', Journal of Clinical Sleep Medicine, Vol. 3, No. 2.
3. Erlacher, D. & Stumbrys, T. (2014) 'The Science of Lucid Dream Induction", in Hurd, R. and Bulkeley, K. (2014) Lucid dreaming. Santa Barbara, Calif.: Praeger.