Dreamhost offers the handy service called Dreamhost Donations - Allowing DH customers to take donations for the cost of running their site, like a tip jar.

Visitors to your website can click on a image link letting them make a donation via PayPal towards your bill with Dreamhost.

Remember that donations can not be cashed out.

You can create your own image and link (like the one below) by logging to your Dreamhost Web Panel, under the link “Donations (To You!)”.

Alternatively, if you are using Wordpress there are a couple of donation plugins including Owen Cutajar’s Sponsor Me or the Gaboinked! Chipin Sidebar Widget.

Also you could set-up donation links and buttons directly through PayPal.