Plugin settings panel, checkbox to use or not use function

Hi!

I have a plugin (or right now a bunch of plugins that i plan to make into one) that lets me do custom write panels to do basically what ever i want. But right now each function is a separate plugin, and im planning to merge theme into one plugin containing loads of features. But i may not want to use all of them all the time, so i was thinking id make a settings page for it on the admin panel. Here i would want checkboxes to say Enable and Disable, this way i suppose i could fetch it in the pluginfile and just do an if enabled show this write panel else dont show it. But i have no idea how to code this.. Id appreciate it Alot if someone would be kind enough to help me do this! Thanks in advance / Christopher