Use this page to "character reference" encode the email addresses on your website to make it more difficult for spam bots to harvest them. While the smarter Spam bots will decode any HTML character reference encoding, the majority of the bots are not yet that sophisticated and will pass by without seeing your email address. While this should help to reduce the rate at which your Spam problem grows, it is preferable not to paste your email address on to a web page at all, although not pasting - and say forcing your potential clients to use a web form instead will probably reduce the number fo leads that you recieve.
To use the encoded address that this page generates, just paste the weird looking code directly in to the source of your HTML page in the position where you want the e-mail address to appear. If you would like a "mailto:" hyperlink to also be encoded around your address, then be sure to select the "include mailto link" tick box below.