Alright, let's get started! Open up your Adalo project and head over to the page where you want to plop in that form with some nifty conditional logic.

Now, drag and drop the Form component right onto your page. Easy peasy. Then, configure it by picking the data collection where all the form info will be stored.

Time to add those input fields! Make sure you include all the necessary ones, especially those that might need to show up or disappear based on certain conditions.

1. Click on the field you want to show or hide based on conditions.
2. Look over to the properties panel on the right and scroll down to the 'Visibility' section.
3. Hit 'Add Custom Filter'.
4. Set up the conditions for when the field should be visible. For instance, if you want a field to pop up only when another field equals a specific value, set that condition using the options there.

To avoid hidden fields causing validation errors:

1. Go to the 'Advanced' settings on the field that relies on conditional logic.
2. Adjust the validation requirements based on the visibility condition so that hidden fields aren't required.

To make buttons do different things based on form inputs:

1. Head over to the Button settings within the Form.
2. Add the actions you need based on the conditions. For example, if a condition is met, you might want to navigate to a different screen.
3. Use the 'Only If' setting for these actions to specify the condition that triggers each action.

Preview your app to make sure everything's working as it should. Test all the scenarios to confirm that the conditional logic is spot on.

Once you're sure everything's running smoothly, go ahead and publish your app. Now, your form with conditional logic is ready for the world!