I am doing well right now after a difficult year last year. One contributing factor is that I have managed to avoid colds all year so far which has allowed me to avoid any courses of IVs.
One thing I would like to share is that the Cold Defence nasal spray has really helped minimize or eliminate cold symptoms - I only came across it recently but it seems to help a lot. It's available in the UK from Boots (don't know about US) and you can use it when you get the first symptoms. Here's a link: http://www.boots.com/en/Boots-Pharmaceuticals-Cold-Defence-Nasal-Spray-20ml_1224268/
In my experience, when using the spray the cold still leaves you feeling a bit drained but it doesn't cause the usual cough that knocks my lung function down + usually leads to IVs. I'd be interested in hearing from anyone who has tried this (or similar) to see if this worked for you.