SharePoint loves its counterpart in Office. So if you have SharePoint 2013, make sure you have Office 2013 installed.
SharePoint loves internet access, so the more bandwidth you have the better.
SharePoint loves 2 browsers, Chome and IE. Site Pages are so much easier to format in Chrome, but you can only import spreadsheets in IE.
SharePoint loves it when you give it well structured content so its search engine can pur along.
SharePoint loves fresh content, so make sure you add something new either every day or every week.
SharePoint loves TLC so make sure the backups are running and tested, and maintenance is done to servers.
SharePoint loves proper users, so make sure your AD is up to date and the managers are added to each person.