How to enforce good sleep hygiene once you had two kids?

Hi r/parenting,A bit of background: I have a 2.5 yo and a five month old baby. Both kids were born happy and healthy. I'm raising them with my husband, grandparents and aunts helps us a lot. We are a happy family who is learning something new about having two kids daily.Our 2.5yo was an okay sleeper. He went down easily, woke up to eat and then went back to bed immediately. Over time he would eliminate each nightly feeding until shortly before the 12 month mark he slept through the night. There wasn't any formal sleep training other than bedtime routine and then crib. His naps were a nightmare but he learned to extend them over time and overall he grew up to be a very good sleeper to this day.Enter baby no.2. She like her older brother spent the first 1-2 months in my bed where it was easy to nurse her. After a while I'd start putting her in the crib after nightly feeds though not as consistently as my first one, usually because I was so tired from having two kids that I'd sometimes fall asleep before she was done nursing and she would just stay next to me for the rest of the night . Overall though she used to do stretches of 3-4 hours. Her naps are also very short and she needs a lot of help resettling. Also I noticed that when she makes any sounds close to the morning I jump to the crib to keep her quiet so that she doesn't wake up the 2.5yo.She is also often sick due to the germs the 2.5yo brings home from the daycare he attends twice a week for halfdays. Currently she's battling some virus that has left her covered in a rash which itches sometimes. She's also a big fan of rolling over on her stomach and doesn't know that she is fully capable of rolling back (I've seen her do it, she just forget).Over the last little while she's been waking up hourly which has left me more tired than I can describe in words. I'm beside myself with fatigue. This frequent waking could be due to the sicknesses, sometimes it is rolling over or sometimes she is just awake for whatever reason. If I am still up by the time she wakes up I rock her back to sleep because that's the only way she will settle. If she wakes up while I'm asleep I usually nurse her back to sleep and again,sometimes she stays in bed with me (bed is in her nursery). I fully accept that a lot of this is my fault, I'm just not sure how to handle changing it. I have zero critique of crying out approaches to sleep training , I just know I myself cannot do it. The sound of her crying which starts at 11/10 is not something tired me can tolllerate. I feel myself getting angry and I see she's in great distress so I just pick her up.this tells me I can't rely on any crying method to get her to sleep. At the same time I'm not sure how to go on in this manner. Sure I can hope that whenever this rolling thing stops or when this rash disappears that things will be better and until then I'll be tired, grumpy and I'll yell at everybody, but I know this to be a poor solution.My question to this community is, how did you handle having two kids and guiding the second one to sleep when you're tired from having two? What words of advice or wisdom can you offer to this tired mother?Obligatory admission of mom guilt: the baby is wonderful. She's happy during the day and I feel awful over complaining about her and I feel like garbage when I find myself getting angry over her crying. via /r/Parenting http://ift.tt/2tvbRO1