Defining the Aim

• Clearly articulate the aim of the investigation. This should include what you hope to discover or confirm.
• The aim should reflect a geological concept, problem or phenomenon.
• Make the aim specific to ensure a focused approach throughout the investigation.

Formulating a Hypothesis

• A hypothesis can be derived from the aim. It is a clear, testable prediction that can be proved or disproved by the investigation.
• It should be based on previous geological knowledge, research or observations.
• Consider potential cause-effect relationships in formulating the hypothesis.

Setting Objectives

• Identify objectives that will help achieve the aim. They should be specific, measurable, achievable, relevant, and time-bound (SMART).
• Objectives should lead to tangible outcomes, such as data collection, data analysis, or reaching a conclusion.
• Clarify how each objective will contribute to the verification of the hypothesis.

Deciding on Methodology

• Identify methods for data collection. Make choices based on the requirements, available tools, and feasibility.
• Choose methods that will yield reliable and valid results.
• Specify each method in detail to ensure clarity of the process and allow for replication.

Identifying and Managing Risks

• Highlight any potential risks in the practical work. Consider all stages of the investigation from transportation to the site, data collection, to handling of geological samples or tools.
• Specify measures to mitigate these risks, including wearing appropriate personal protection equipment (PPE) or following specific safety guidelines.
• Keep a record of all potential risks and mitigation measures to ensure personal and others' safety.

Equipment & Supplies

• Clearly list all equipment and supplies needed for the investigation. This includes anything from data collection tools, geological measurement instruments, to notebooks and pens.
• Remember to also take into account any necessary fieldwork clothing like boots, rain gear, or hats depending on your investigation location and weather conditions.

Sample Collection

• Plan out your sample collection strategy. Make sure to collect enough samples for valid measurements and to handle possible loss or contamination.
• Keep track of the location of each sample. Use mapping apps, GPS devices or traditional maps and compasses.
• Label samples properly to avoid any mix-ups or incorrect identification later.

Time Management

• Develop a realistic timeframe for the investigation, taking into consideration both the data collection and analysis stages.
• Remember to include a buffer for unexpected delays in the field, data collection or analysis stages.
• Have a backup plan in case of equipment failure, weather issues, or other unforeseen problems.

While working on each section in your plan - aim, hypothesis, objectives, methodology, risks, equipment & supplies, sample collection and time management - remember to keep the focus on the geological context and your specific aims and objectives. With a clear and detailed plan, the practical investigations should run more smoothly, ensuring success in your geology practical skill development.