Hmmm, interesting topic. I think I might be able to help a bit.
I've actually lost both my Uncle, the only one on my Mum's side, & my Dad, both to cancer. My Uncle was first, followed by my Dad a year later, both in December. Some of my family aren't big fans of December any more, but I guess I'm OK with it.
When my Uncle died, It was extra painful because his wife's sisters started manipulating her, slowly cutting us off until he died. What we ended up doing was helping each other out however we could. Unfortunantly, the manipulating has started to surface again, coming up to 3 years after, with her kids being fed lies about money & who was causing who to have less access to my Uncle while he was dieing. It's actually hurting the family a bit, but were pulling through. The biggest downside is that we don't get to see our cousins anymore, & we really got along well with them, especially my sister & their oldest, who is just a year older.
Soon after, my Dad was also diagnosed with cancer & started the fight. He started winning, but then it came back with vengeance & finally killed him. He was actually home, with all our family & his brothers & sisters there too. In fact, he was rude enough not to wait for me to finish hanging out my washing. My brother's girlfriend came out & told me he might have died. So much for the week my Mum was told. His death was a lot "neater", so to speak, in that there hasn't been any problems other than him actually dieing.
Basically, I've personally gotten through it all by helping everyone else out, & keeping my sense of humor. Especially when Dad died, our whole family needed someone to lean on, & I seemed to naturally fall into that position, especially since I'm the oldest. Actually, if I wasn't being strong for everyone else, I possibly wouldn't have been able to handle it so well.
I guess the best advise is talk about it. I know it sounds a bit cleshe, but it's actually not that bad advice. If you try to bottle it up, it'll just find the first chance to get out. That's what happened with Mum while enjoying some end of week drinks at work. She'd drunk a bit much & it was all starting to come out. Thankfully I was already near by, so I walked to her work & we ended up taking a company paid taxi home. It might not be the toughest thing to do, but if you need to, do it.
Oh, & don't forget to laugh. Laughter is the best medicine.