Ditto on the glove straps!

I had a problem with the ring finger and small finger going numb on both hands (but mostly the right). After a longer ride (more than 2 hours) the numbness would last for days and it drove me NUTS. The first thing that I did to get rid of it was change my bike. The one I was riding was too big and the bars were WAY too wide (by 8 cm!). I just could not get that bike to work for me at all. When I got a bike that fit me and then had it fit correctly, the numbness and pain went away...until I got new gloves. I couldn't figure out why my hands were so numb that day until I took off my gloves...they were too tight at the wrists! Once I left them undone, the numbness went away (these were a weird glove style, I guess). I haven't had a problem since as long as I remember to keep the straps a little loose.

Moral of the story? Check your bike fit (professionally) and make sure your gloves aren't cinched up too tight.