So I decided to just take the leap and use several of my most favorite pieces that I had held on to for years. And as a result of being more comfortable with this, my art improved. Does everything work out and look good? Absolutely not. But without risk there is no reward and giving myself permission to use my good stuff made me a better artist in the long run. This one choice has made me more willing to take creative risks.
So I say, jump in the deep end and just go for it.