Usually about 20%, sometimes more. If I sit down at happy hour and get a half priced app and a couple beers and it comes to $12, I'll leave a twenty. If the waiter waitress is especially helpful, then more. If I am sitting around waiting too long for a drink, or something with the order gets really fucked up, I have no problem stiffing them. I go by the train of thought that shitty servers shouldn't get pity tips. They should go home at night and say, "I can't live off this I need a different job."

If I am not running a tab, then I'll tip a dollar with every beer I get. Bartenders at some of the dumps I go into are amazed by that.

If I am in a very crowded bar, I'll tip the bartender a 5 or a 10, and tell him if he sees me, "I'll be needing one of these" as I let him see my beer again and the tip. Then I'll tip a dollar a drink again. I do the same my first drink at weddings/events.

Tow truck drivers, $5 for a lock out or a jump, $10 for a short tow, $20 for a long one.

Garbage guys, $20 a piece at X-Mas.

Delivery guys (furniture or electronics), $10 each

Strippers, $1 at a time. Old or nasty, I'll give her a $5 and tell her not to come near me again.

Valet parking, free-$5, if it costs-$1

Hotel Staff, one night, smoking room $5, if I get stuck in a non smoking $20, so they don't report that I smoked in it.

Friend that loans me a dollar amount over $500- 10%

Thank god I haven't had to tip a priest yet.

Just remembered, Butcher Shop, a $20 in the tip jar at X-Mas.