I use a Therma Cell and Max Deet or No Stinking Bugs. I also spray my clothes (or use the soaking version) with Duranon.
The Thermacell works great when sitting still, but it's pretty worthless when stalking.
The No Stinking Bugs is from Scent sheild and is 25% Deet mixed with a cover scent. Max Deet is straight Deet and I use it when the bugs are REALLY bad. It smells funny, but I am not sure the scent really worries deer. I use these when I know I am going to be moving.
The Duranon is oderless and sprayed on your clothes (never on your person) and not only repels ticks, skeeters and chiggers, but also kills them. Since using it I have NEVER had a tick on me.
A note on the Therma Cell. In a post or two above the little carrier for the unit was mentioned. I think this is invaluable. Not only does it let you carry extra fuel and repellant, but you can strap the unit to your stand or blind and keep it in the upright position. This is important as my experience has been that when you lay it down, it burns fuel faster. Maybe it's just my imagination, but I don't think so.