Oh how I love florals. While perusing my local floral shop I fell in love with the simple white snow flower with such rich berry tones. $50 later, I had all the elements I needed to create a bouquet rich in color and texture.
I would never suggest DIYing florals for your wedding, but I understand that as far as budgets go, sometime something has to give. So if this is your "give" here is a great bouquet with a color palette that is beautiful no matter what season.
As for a few tips, grab about 4-6 different types of floral. Pair them together until you find the perfect mix of color and texture. Then go for it. Play around until you find something that you love. (These are the best tips I can provide from one non-florist to another :) )