How can one overcome agitation developed by not sitting regularly? This one is for the lay meditators. 

Although i think there is a component of sloth and torpor involved in the situation. There are other factors too. At times for me breakage of a sila makes it hard for me to sit. And if this cycle is not broken it can take days to come to mindset to start sitting again and to convince myself it's ok to start from scratch. 

Does anyone else encounter this problem and how do you deal with it?
The effects of meditation are similar to the effects of brushing your teeth: If you don't brush your teeth for one day nothing will happen but if you do for one week... you will suffer the consequences in the dentist, so what I'm saying is that what you lose for not meditating will have a price in the future specially when you face a bad situation, stress and aversion will come stronger, you are losing a precious opportunity of improving awareness and becoming a better and stronger human being.

Make it a priority, meditate for 10 minutes if you don't have much time, but do not let lazyness wins this battle, do it for yourself and your own well being!