Bumpy roads helped me.
Mainly give it TIME. Don't rush baby!! The baby has a lot of work to do during labor.
Drive on bumpy roads!!!!!! Its uncomfortable but I've heard it really works.. I'm 35 weeks tommaro and I notice every time I drive over a very bumpy road ill get a contraction.. so I can only imagine it would help get someone who is ready to get contractions regular.
also drink caffeine!!!! Go to Starbucks and get a nice big caffeinated drink lol.. cause it will make the baby all excited and gittery which will cause contractions to increase! :) best of luck!
Walking and/or have sex! Maybe take a warm bath...sometimes relaxing more will help out!
My contractions never got regular even when I was in labor....but walking..galloping...squatting...swaying...gravity is your best friend