I thought about this and it works for me so maybe you can try it? o.o
this is how i came about it:
one day like 3 weeks ago, i was going to a shop to get a milkshake, as i was going there i decided to take the long way around to the shop instead of the short way, and decide that i will 'discipline' myself into lucid dreaming tonight, i took the long way around, then walked the long way back, holding a freezing milkshake, that very night i lucid dreamed! . so basicly you just discipline yourself more on daily basis in things you dont like doing (like getting out of bed to feed your cat, or getting up in the middle of the night [which could be a combined wbtb) ! . see? it worked for me and i hope it works for you. and if someone already figured this out then i'm not suprised lol.