Some Domain powers are enabling the cleric to touch one creature to give it some boons. Example, from CRB, War Domain:
Battle Rage (Sp): You can touch a creature as a standard action to give it a bonus on melee damage rolls equal to 1/2 your cleric level for 1 round (minimum +1). You can do so a number of times per day equal to 3 + your Wisdom modifier.
or CRB's Strength Domain:
Strength Surge (Sp): As a standard action, you can touch a creature to give it great strength. For 1 round, the target gains an enhancement bonus equal to 1/2 your cleric level (minimum +1) to melee attacks, combat maneuver checks that rely on Strength, Strength-based skills, and Strength checks. You can use this ability a number of times per day equal to 3 + your Wisdom modifier.
Can I use the benefits of Battle Rage by touching myself?
I understand that this only lasts for 1 round so with War Domain that would be utterly useless — unless the bonus kicks in for the next round. Can you clarify that as well?