I've been enjoying photography for many years; Starting as a 6 yr. old with a Brownie box camera, then progressing to a Konica C35 range finder as a young teenager.
Now, many years later, I shoot primarily with DSLRs, and an assortment of lenses ranging from wide angle to telephoto. I also own a couple of point and shoot cameras, which I use when kayaking or when the bulk of a DSLR and lenses is inconvenient. (These point & shoot cameras, while limited in what they can do, are very easy to use, convenient to carry, and take very good pictures.) (Their biggest failing, in my opinion, is that they cannot be used for photographing tall buildings, as they tend to distort the lines of tall buildings.) (Parallax)
Tip # 1 - When I first started photographing butterflies, I was convinced that a telephoto lens (70 - 300 mm in my case, ) was the best lens choice. I shot butterfly images with this lens on several occasions, and realized that a low percentage of the images that I shot were usable. The rest were blurry or out of focus.
I then decided to try my 100 mm macro lens, which gave me a better ratio of usable to non-usable images.
Tip # 2 - Even though I had managed to increase my usable image ratio by going to a macro lens, I was still shooting a fairly low percentage of usable images, so I started trying to find ways to have better success.
I decided to switch from shooting in auto mode, to shooting in fully manual mode, which allowed me to set my shutter speed and aperture as needed.
I decided to shoot at shutter speeds of 1/250 - 1/500 of a second, depending on what the light was like, and what type of butterfly I was trying to capture. This was a critical move in getting my usable image ratio up.