Since they are found just about everywhere. You need to be flexible in your habits when hunting rabbits.
For the most part moving slowly through cover is the best way to catch them sitting. When in their "form" they are very confident of their camo and may let you walk right up on them before they spook. Loud noises and ground vibration will spook them. Tread lightly.
On real cold days hunt with the sun to your back. You'll more likely find them on the sunny side of whatever cover they are using.
A partner can help a lot. Just spread out 10 or 12 yards apart and follow above instructions.
Any kind of heavy cover should be checked very carefully. Down trees, brush piles, blackberry patches all should be checked carefully.Don't overlook junk piles, auto junk yards or farm equipment.
If you can the "rough" around golf courses is often a gold mine for small game.
Of course a fresh snow helps with spotting and with tracking. You'll find they really move around. The track looks like this... --: When hopping they plant their front feet and then the rear feet are brought around and planted in front.
You'll get a lot of opinions about what makes the best arrowhead for rabbits. I prefer plain old steel blunts. They will anchor the rabbit pretty well, won't break the bank and negotiate brush pretty well... always be prepared to follow up your shot.
Don't forget your rabbit arrows when you are away from home. Javelina country usually has great rabbit populations.
The same can be said for antelope country. Some of the best rabbit hunting I've had was in eastern Wyoming and Montana. I've heard really good things about New York state.