To be honest I've not suffered from this too much.
I first created my youtube account in 2006. I put up a couple of videos for fun, and then lost interest - didn't even log in to youtube for a good year, maybe 2!
Finally I logged in (after resetting the password because I had forgotten it, it had been that long!) and was surprised to see a healthy number of views and subscribers. I applied for youtube partner for fun, not expecting to get anywhere, and a day later was shocked to see they had accepted me!
Even though I had not posted for a good year, the subscribers seemed to stick by me!
Since gaining partner status, I've been putting up videos randomly. I don't have a set schedule. Sometimes its once every 2 weeks, sometimes its once a month. At times its been several in the same week. I dont even have a facbook or twitter page where i keep my subscribers informed on new projects etc. To be honest, it hasn't really hurt me too much, although I do realise the importance of having a good routine, I don't really think its vital.